{"id":10533,"date":"2021-10-19T13:14:56","date_gmt":"2021-10-19T13:14:56","guid":{"rendered":"https:\/\/www.mathsweek.ie\/2021\/?page_id=10533"},"modified":"2022-10-26T11:52:41","modified_gmt":"2022-10-26T11:52:41","slug":"irish_times_maths_week_poster","status":"publish","type":"page","link":"https:\/\/www.mathsweek.ie\/2025\/irish_times_maths_week_poster\/","title":{"rendered":"Irish Times Maths Week Poster"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">@media only screen and (max-width:1024px) {.fusion-title.fusion-title-1{margin-top:0%!important; margin-right:0px!important;margin-bottom:30px!important;margin-left:0px!important;}}@media only screen and (max-width:640px) {.fusion-title.fusion-title-1{margin-top:0px!important; margin-right:0px!important;margin-bottom:20px!important; margin-left:0px!important;}}<\/style><div class=\"fusion-title title fusion-title-1 fusion-title-text fusion-title-size-one\" style=\"margin-top:0%;margin-right:0px;margin-bottom:30px;margin-left:0px;\"><div class=\"title-sep-container title-sep-container-left fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:#eaeaea;\"><\/div><\/div><h1 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:50;line-height:1.2;\">Irish Times Maths Week Poster 2022<\/h1><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:#eaeaea;\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-1\"><p>We will be present the poster and the answers to the puzzles here on Thursday 20 October.<\/p>\n<p>One side will contain puzzles and games to give your brain a good workout and the reverse will feature an attractive poster celebrating women in mathematics.<\/p>\n<p>We will be present the poster and the answers to the puzzles here on Thursday 20 October.<\/p>\n<p>Maths Week Ireland is an annual all-Island celebration of mathematical thinking. A basic proficiency in maths is necessary in daily life. Basic maths is needed in most jobs and a higher level of maths opens the door to many rewarding careers. Mathematics is particularly useful in describing behaviour of the natural world and helps us understand and predict impacts of such things as the climate emergency and pandemics.<\/p>\n<p>Over 400,000 people are expected to take part in activities in school, events at universities and other venues across the island, and online. Public and family events include a Celebration of Mind at the National Botanic Gardens Dublin next Sunday, 23<sup>rd<\/sup> October.<\/p>\n<p>Maths Week was founded by Calmast, the STEM Engagement Centre at South East Technological University.<\/p>\n<p>For more information see <a href=\"http:\/\/www.mathsweek.ie\">www.mathsweek.ie<\/a><\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-0{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-0 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div ><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-1.pdf\" target=\"_self\" aria-label=\"irish time poster\"><img decoding=\"async\" width=\"1191\" height=\"842\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster.png\" class=\"img-responsive wp-image-12970\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-200x141.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-400x283.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-600x424.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-800x566.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster.png 1191w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/a><\/span><\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster-2.pdf\" target=\"_self\" aria-label=\"irish time poster2\"><img decoding=\"async\" width=\"1191\" height=\"842\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2.png\" class=\"img-responsive wp-image-12971\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2-200x141.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2-400x283.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2-600x424.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2-800x566.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/irish-time-poster2.png 1191w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/a><\/span><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-1{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-1 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-1{width:100% !important;order : 0;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-1{width:100% !important;order : 0;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-1{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-2{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-2 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-2{width:100% !important;order : 0;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-2{width:100% !important;order : 0;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-2{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-2\"><h3>Puzzle Solutions 2022 Poster<\/h3>\n<p>With the poster was published in the Irish\u00a0Times\u00a0on Thursday 20 October, please find our answers below<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-3{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-3 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-3{width:100% !important;order : 0;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-3{width:100% !important;order : 0;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-3{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-4 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-3\"><h4 class=\"fusion-responsive-typography-calculated\" data-fontsize=\"18\" data-lineheight=\"27px\">Picture by Albrecht D\u00fcrer (1471-1528)<\/h4>\n<\/div><div class=\"fusion-text fusion-text-4\"><p>This is a section from a picture by Albrecht D\u00fcrer (1471-1528) it shows a 4 x 4 magic square. To make it easier to read, it is presented below.<\/p>\n<p>Each column and row adds up to 34. But, this is a very special magic square. There are many more groups of four numbers that add up to 34.<\/p>\n<p>How many can you find?<\/p>\n<p>When do you think this picture was drawn? (the clue is in the square)<\/p>\n<\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><img decoding=\"async\" width=\"1024\" height=\"462\" title=\"ALbert durer4\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4-1024x462.png\" class=\"img-responsive wp-image-13004\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4-200x90.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4-400x180.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4-600x271.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4-800x361.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/ALbert-durer4.png 1049w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-5\"><p><strong>Answers<\/strong><\/p>\n<p>People have reported 86 different sets of four numbers that add up to the magic constant of 34. The more obvious ones are\u2013 four rows, four columns, two diagonals, the four quadrants, the four numbers in the middle and the four numbers at each corner.<\/p>\n<p>The picture was made in year 1514 (clue: centre of bottom row)<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-4{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-4 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-4{width:100% !important;order : 0;}.fusion-builder-column-4 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-4{width:100% !important;order : 0;}.fusion-builder-column-4 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-6\"><h4 class=\"fusion-responsive-typography-calculated\" data-fontsize=\"18\" data-lineheight=\"27px\">Square of the Cross<\/h4>\n<\/div><div class=\"fusion-text fusion-text-7\"><p>Is it possible to arrange the digits 1 2 3 4 5 6 7 8 9, one in each square of the cross, such that the sum along the vertical column equals the sum along the horizontal row?<\/p>\n<p>This can be solved with any odd number in the centre square.<\/p>\n<p>When we put a number in the centre square the remainder must be divided into two equal parts.<\/p>\n<p>1+2+3+4+5+6+7+8+9 = 45<\/p>\n<p>IF we have an odd number in the centre square we will have an even sum left. If we put\u00a0 9 in the centre square the remaining numbers add up to 36. So there should be 18 in each arm along with the centre 9<\/p>\n<\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-4 hover-type-none\"><img decoding=\"async\" width=\"1024\" height=\"939\" title=\"Screenshot 2022-10-19 at 15.22.37\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-1024x939.png\" class=\"img-responsive wp-image-13007\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-200x183.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-400x367.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-600x550.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-800x734.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37-1200x1101.png 1200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.22.37.png 1426w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/span><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-5{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-5 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-5{width:100% !important;order : 0;}.fusion-builder-column-5 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-5{width:100% !important;order : 0;}.fusion-builder-column-5 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-4{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-5 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-5{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-6 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-6 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-8\"><h4>Counting Counties<\/h4>\n<\/div><div class=\"fusion-content-boxes content-boxes columns row fusion-columns-1 fusion-columns-total-1 fusion-content-boxes-1 content-boxes-icon-with-title content-left\" data-animationOffset=\"100%\" style=\"margin-top:0px;margin-bottom:0px;\"><style type=\"text\/css\">.fusion-content-boxes-1 .heading .content-box-heading {color:#191919;}\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .fusion-read-more:hover:after,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .fusion-read-more:hover:before,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .fusion-read-more:hover,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover .icon .circle-no,\n\t\t\t\t\t.fusion-content-boxes-1 .heading .heading-link:hover .content-box-heading {\n\t\t\t\t\t\tcolor: #e9a825;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover .icon .circle-no {\n\t\t\t\t\t\tcolor: #e9a825 !important;\n\t\t\t\t\t}.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button {background: #d6ad5a;color: #785510;background-image: -webkit-gradient( linear, left bottom, left top, from( #e8cb90 ), to( #d6ad5a ) );background-image: linear-gradient( to top, #e8cb90, #d6ad5a )}.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button .fusion-button-text {color: #785510;}\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon > span {\n\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover .heading .icon > span {\n\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t}<\/style><div class=\"fusion-column content-box-column content-box-column content-box-column-1 col-lg-12 col-md-12 col-sm-12 fusion-content-box-hover content-box-column-last content-box-column-last-in-row\"><div class=\"col content-box-wrapper content-wrapper link-area-box icon-hover-animation-fade\" style=\"background-color:rgba(255,255,255,0);\" data-animationOffset=\"100%\"><div class=\"fusion-clearfix\"><\/div><div class=\"content-container\" style=\"color:#707070;\">\n<p>Do you know all the counties of Ireland?<\/p>\n<p>Our map is a strange one. It doesn\u2019t represent the real shape and size of the counties, but shows how many other counties they border (with the connecting line).<\/p>\n<p>Can you find all the counties on our map and fill in their names?<\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">\n\t\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .heading-link:hover .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box:hover .heading-link .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-1 .fusion-content-box-hover .link-area-box-hover .heading .icon i.circle-yes {\n\t\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t\t}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-5 hover-type-none\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/counting-counties.pdf\" target=\"_self\" aria-label=\"Counting Counties\"><img decoding=\"async\" width=\"624\" height=\"842\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Counting-Counties-1.png\" class=\"img-responsive wp-image-13013\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Counting-Counties-1-200x270.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Counting-Counties-1-400x540.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Counting-Counties-1-600x810.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Counting-Counties-1.png 624w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/a><\/span><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-6{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-6 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-6{width:100% !important;order : 0;}.fusion-builder-column-6 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-6{width:100% !important;order : 0;}.fusion-builder-column-6 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-7 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-9\"><h4><strong>An Ezee Puzzle<\/strong><\/h4>\n<\/div><div class=\"fusion-text fusion-text-10\"><p>These moving coin puzzles were popularised by the great English puzzler Henry Dudeney (1857-1930). They can be played with coins or counters or any objects that make two distinct sets of four.<\/p>\n<p><strong>The aim of the E puzzle is to reverse the positions of the Green and Red counters in the grid by sliding them along. <\/strong>There are rules of course to make it a challenge:<\/p>\n<ul>\n<li>No more than one piece can be in the same square at a time.<\/li>\n<li>There is no jumping.<\/li>\n<\/ul>\n<\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-6 hover-type-none\"><img decoding=\"async\" width=\"255\" height=\"300\" title=\"Screenshot 2022-10-19 at 15.33.59\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59-255x300.png\" class=\"img-responsive wp-image-13010\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59-200x235.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59-400x470.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59-600x706.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59-800x941.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.33.59.png 944w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/span><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-7{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-7 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-7{width:100% !important;order : 0;}.fusion-builder-column-7 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-7{width:100% !important;order : 0;}.fusion-builder-column-7 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-8 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-11\"><h4><strong>Magic Squares<\/strong><\/h4>\n<\/div><div class=\"fusion-content-boxes content-boxes columns row fusion-columns-1 fusion-columns-total-1 fusion-content-boxes-2 content-boxes-icon-with-title content-left\" data-animationOffset=\"100%\" style=\"margin-top:0px;margin-bottom:0px;\"><style type=\"text\/css\">.fusion-content-boxes-2 .heading .content-box-heading {color:#191919;}\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .fusion-read-more:hover:after,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .fusion-read-more:hover:before,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .fusion-read-more:hover,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover .icon .circle-no,\n\t\t\t\t\t.fusion-content-boxes-2 .heading .heading-link:hover .content-box-heading {\n\t\t\t\t\t\tcolor: #e9a825;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover .icon .circle-no {\n\t\t\t\t\t\tcolor: #e9a825 !important;\n\t\t\t\t\t}.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button {background: #d6ad5a;color: #785510;background-image: -webkit-gradient( linear, left bottom, left top, from( #e8cb90 ), to( #d6ad5a ) );background-image: linear-gradient( to top, #e8cb90, #d6ad5a )}.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button .fusion-button-text {color: #785510;}\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon > span {\n\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover .heading .icon > span {\n\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t}<\/style><div class=\"fusion-column content-box-column content-box-column content-box-column-1 col-lg-12 col-md-12 col-sm-12 fusion-content-box-hover content-box-column-last content-box-column-last-in-row\"><div class=\"col content-box-wrapper content-wrapper link-area-box icon-hover-animation-fade\" style=\"background-color:rgba(255,255,255,0);\" data-animationOffset=\"100%\"><div class=\"fusion-clearfix\"><\/div><div class=\"content-container\" style=\"color:#707070;\">\n<p>A magic square is an arrangement of numbers in a grid where the numbers in each row, column and the diagonals all add up to the same amount. This amount is called the magic constant. The 3&#215;3 magic square shown uses the numbers 1-9. Can you figure out how to fill in the missing numbers?<\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">\n\t\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .heading-link:hover .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box:hover .heading-link .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-2 .fusion-content-box-hover .link-area-box-hover .heading .icon i.circle-yes {\n\t\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t\t}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-7 hover-type-none\"><img decoding=\"async\" width=\"300\" height=\"135\" title=\"square game EL1910223\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/square-game-EL1910223-300x135.png\" class=\"img-responsive wp-image-12998\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/square-game-EL1910223-200x90.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/square-game-EL1910223-400x180.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/square-game-EL1910223.png 567w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 300px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-12\"><p>The left-hand column adds up to 15, which tells us that all columns, rows and diagonals must add up to 15.<\/p>\n<p>So we see for top row 8 + 6 = 14 so the missing number must be 1. The middle column then is 1+ 9 = 10 so the centre number should be 5.<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-8{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-8 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-8{width:100% !important;order : 0;}.fusion-builder-column-8 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-8{width:100% !important;order : 0;}.fusion-builder-column-8 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-9 fusion_builder_column_1_2 1_2 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-13\"><h4>Form a Closed Cube<\/h4>\n<\/div><div class=\"fusion-text fusion-text-14\"><p>Which one of the following shapes, when folded along the lines shown will not form a closed cube?<\/p>\n<\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-8 hover-type-none\"><img decoding=\"async\" width=\"300\" height=\"102\" title=\"Screenshot 2022-10-19 at 15.28.29\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29-300x102.png\" class=\"img-responsive wp-image-13008\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29-200x68.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29-400x136.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29-600x204.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29-800x272.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-15.28.29.png 1158w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 600px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-15\"><p>Number 3 cannot fold into a box<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-9{width:50% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-9 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 3.84%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.84%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-9{width:100% !important;order : 0;}.fusion-builder-column-9 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-9{width:100% !important;order : 0;}.fusion-builder-column-9 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-6{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-7 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-10 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-16\"><h4>Brainteasers<\/h4>\n<\/div><div class=\"fusion-text fusion-text-17\"><p>Errata: There were two errors in the short brain teasers. These were the fault of Maths Week not the Irish Times. Rough work got mixed up with the submitted text.) Thanks to a reader for pointing this out to us and apologies for any frustration caused.<\/p>\n<p>Question 10. The answer should be 4: two boys and two girls. This Mary has two brothers (twice as many) and one sister and John has two sisters (twice as many) and one brother.<\/p>\n<p>Question 13. Unluckily for us, the figures given in the question were wrong. This is a greater error as it may have caused frustration.<\/p>\n<p>The values should have been given as:<\/p>\n<p>A bag contains money in 5, 10 and 20 euro notes. You would have to take<\/p>\n<ul>\n<li>16 notes out to be sure of getting a \u20ac20.<\/li>\n<li>15 notes to be sure of getting a \u20ac10<\/li>\n<li>14 notes out to be sure of getting a \u20ac5<\/li>\n<\/ul>\n<p>How much money is in the bag?<\/p>\n<p>We present the method below<\/p>\n<\/div><div ><span class=\" fusion-imageframe imageframe-none imageframe-9 hover-type-none\"><img decoding=\"async\" width=\"919\" height=\"1024\" title=\"Brainteasers 2022 (irish time)\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59-919x1024.png\" class=\"img-responsive wp-image-13022\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59-200x223.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59-400x446.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59-600x669.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59-800x892.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2022\/10\/Screenshot-2022-10-19-at-16.29.59.png 1084w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 919px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-18\"><p>Summarizing our data from Question 13:<\/p>\n<ul>\n<li>16 notes out to be sure of getting a \u20ac20. That means there is 15 \u20ac5 and \u20ac10 notes<\/li>\n<li>15 notes to be sure of getting a \u20ac10. That means there is 14 \u20ac5 and \u20ac20 notes<\/li>\n<li>14 notes out to be sure of getting a \u20ac5 That means there is 13 \u20ac10 and \u20ac20 notes<\/li>\n<\/ul>\n<p>We can proceed by trial and error: picking some starting values and testing them out.<\/p>\n<p>Here though, we will use the method of simultaneous equations to solve the problem. We need to express our information in mathematical form:<\/p>\n<p>For convenience we will call the number of \u20ac20&#8217;s T, the number of \u20ac10&#8217;s X and the number of \u20ac5&#8217;s V.<\/p>\n<p>Then we can write our three pieces of information from above as follows<\/p>\n<ol>\n<li>V + X = 15<\/li>\n<li>\u00a0V + T = 14<\/li>\n<li>\u00a0X + T = 13<\/li>\n<\/ol>\n<p>Subtract 2. from 1.<\/p>\n<p>V + X = 15<\/p>\n<p>-(V + T = 14)<\/p>\n<p>Gives us<\/p>\n<p>X &#8211; T = 1<\/p>\n<p>Adding this combined information from 1. and 2. to 3.<\/p>\n<p>X &#8211; T = 1<\/p>\n<p>+ X + T = 13<\/p>\n<p>Gives us 2X = 14<\/p>\n<p>Therefore X, the number of \u20ac10 notes is 7.<\/p>\n<p>If X is 7 and X + T = 13, then T must be 6.<\/p>\n<p>V = X = 15 so V must be 8.<\/p>\n<p>Number of \u20ac5 (V) = 8 = \u20ac40<\/p>\n<p>Number of \u20ac10 (X) = 7 =\u20ac70<\/p>\n<p>Number of \u20ac20 (T) = 6 = \u20ac120<\/p>\n<p>Total amount of money in the bag is \u20ac40 + \u20ac70 + \u20ac120 = \u20ac230<\/p>\n<\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-10{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-10 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-10{width:100% !important;order : 0;}.fusion-builder-column-10 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-10{width:100% !important;order : 0;}.fusion-builder-column-10 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-7{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 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fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;width:100%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"border-color:#ff8d06;border-top-width:6px;\"><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-12{width:66.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-12 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 2.88%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 2.88%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-12{width:100% !important;order : 0;}.fusion-builder-column-12 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-12{width:100% !important;order : 0;}.fusion-builder-column-12 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-13 fusion_builder_column_1_6 1_6 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-13{width:16.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-13 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 11.52%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 11.52%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-13{width:100% !important;order : 0;}.fusion-builder-column-13 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-13{width:100% !important;order : 0;}.fusion-builder-column-13 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-8{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-9 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1289.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-9{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-10 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#eaeaea;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-14 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-first\" style=\"width:50%;width:calc(50% - ( ( 4% ) * 0.5 ) );margin-right: 4%;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\"><\/style><div class=\"fusion-title title fusion-title-2 fusion-title-text fusion-title-size-one\" style=\"margin-top:0%;margin-right:0px;margin-bottom:30px;margin-left:0px;\"><h1 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:50;line-height:1.2;\">Climate Action with Maths<\/h1><div class=\"title-sep-container\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:#eaeaea;\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-19\"><p><strong>Save Energy, Save Money<\/strong><br \/>\n<strong>Electrical appliances that generate heat or movement generally use the most electricity.<\/strong><\/p>\n<p>\uf0da Only fill your kettle for what you will need. Don\u2019t boil a full kettle for one cup of tea!<br \/>\n\uf0da Make sure your dishwater and washing machine are full before running.<br \/>\n\uf0da Dry clothes on a clothes horse if you can.<br \/>\n\uf0da Switch appliances off when you don\u2019t need them.<br \/>\n\uf0da Investigate how technology can help you.<\/p>\n<p><strong>Check out <a href=\"https:\/\/www.seai.ie\/home-energy\/energy-saving-tips\/\" target=\"_blank\" rel=\"noopener\">Sustainable Energy Authority of Ireland\u00a0<\/a><\/strong><\/p>\n<p><strong>and <a href=\"https:\/\/www.nidirect.gov.uk\/articles\/energy-efficiency-tips\" target=\"_blank\" rel=\"noopener\">NIdirect\u00a0<\/a><\/strong><\/p>\n<p><strong>for more advice.<\/strong><\/p>\n<\/div><style type=\"text\/css\"><\/style><div class=\"fusion-title title fusion-title-3 fusion-title-text fusion-title-size-one\" style=\"margin-top:0%;margin-right:0px;margin-bottom:30px;margin-left:0px;\"><h1 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:50;line-height:1.2;\"><\/h1><div class=\"title-sep-container\"><div class=\"title-sep sep-single sep-solid\" style=\"border-color:#eaeaea;\"><\/div><\/div><\/div><div class=\"fusion-content-boxes content-boxes columns row fusion-columns-1 fusion-columns-total-1 fusion-content-boxes-3 content-boxes-icon-with-title content-left\" data-animationOffset=\"100%\" style=\"margin-top:0px;margin-bottom:0px;\"><style type=\"text\/css\">.fusion-content-boxes-3 .heading .content-box-heading {color:#191919;}\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .fusion-read-more:hover:after,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .fusion-read-more:hover:before,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .fusion-read-more:hover,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover .icon .circle-no,\n\t\t\t\t\t.fusion-content-boxes-3 .heading .heading-link:hover .content-box-heading {\n\t\t\t\t\t\tcolor: #e9a825;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover .icon .circle-no {\n\t\t\t\t\t\tcolor: #e9a825 !important;\n\t\t\t\t\t}.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button {background: #d6ad5a;color: #785510;background-image: -webkit-gradient( linear, left bottom, left top, from( #e8cb90 ), to( #d6ad5a ) );background-image: linear-gradient( to top, #e8cb90, #d6ad5a )}.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button .fusion-button-text {color: #785510;}\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon > span {\n\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover .heading .icon > span {\n\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t}<\/style><div class=\"fusion-column content-box-column content-box-column content-box-column-1 col-lg-12 col-md-12 col-sm-12 fusion-content-box-hover content-box-column-last content-box-column-last-in-row\"><div class=\"col content-box-wrapper content-wrapper link-area-box icon-hover-animation-fade\" style=\"background-color:rgba(255,255,255,0);\" data-animationOffset=\"100%\"><div class=\"heading icon-left\"><h2 class=\"content-box-heading\" style=\"font-size:23px;line-height:28px;\">Climate Action with Maths- Poster activity<\/h2><\/div><div class=\"fusion-clearfix\"><\/div><div class=\"content-container\" style=\"color:#707070;\">\n<h4 data-ccp-props=\"{\">This poster was published with the Irish Times on 19 October 2021. The twin purposes are to encourage climate action and to show how useful maths is in our lives.<\/h4>\n<h4 data-ccp-props=\"{\"><b><span data-usefontface=\"false\" data-contrast=\"none\">Introduction<\/span><\/b>\u200b<\/h4>\n<p>Our homes use energy and resources in lots of different ways. When looking to undertake positive Climate Actions you can make many small changes at home which can have a big impact in the future.<\/p>\n<p><b><span data-contrast=\"auto\">BATHROOM:\u00a0<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Water is an extremely precious resource for our lives, and all life on Earth. The less water we use the better for our planet. Choose a quick shower instead of a bath. Avoid running the water while brushing your teeth.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">A 1-minute shower uses about 9 litres of water. How many litres of water do you use if you have a 5-minute shower?\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">\u00a0<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">BEDROOM:\u00a0<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">We all like to get new clothes, but making clothes has a big impact on the environment. You can mend old clothes and upcycle them to create new styles. You can also swap with your friends and buy second-hand to help our planet and reduce waste.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">You sew a square badge onto your jacket. The sides are 2.5cm long and you use 15cm of thread. How much thread would you expect to use for a square badge with sides 4cm long?\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">KITCHEN:\u00a0<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Think twice every time you go to throw something in the bin. Could it be reused? Could it be recycled? Also think, could we make wiser choices when we go shopping? Reducing food waste is a climate action that will also save you money.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">One kg of food waste could represent 3.6 kg of CO<\/span><span data-contrast=\"auto\">2<\/span><span data-contrast=\"auto\"> Emissions. If a household producing 200 kg of food waste every year reduces that waste to 100kg, how much CO<\/span><span data-contrast=\"auto\">2<\/span><span data-contrast=\"auto\"> is saved?<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">\n\t\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .heading-link:hover .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box:hover .heading-link .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-3 .fusion-content-box-hover .link-area-box-hover .heading .icon i.circle-yes {\n\t\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t\t}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-15 fusion_builder_column_1_2 1_2 fusion-one-half fusion-column-last\" style=\"width:50%;width:calc(50% - ( ( 4% ) * 0.5 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><span class=\" fusion-imageframe imageframe-none imageframe-10 hover-type-none\"><a class=\"fusion-no-lightbox\" href=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-poster-191021.pdf\" target=\"_blank\" aria-label=\"Maths Week Irish Times Poster 191021\" rel=\"noopener noreferrer\"><img decoding=\"async\" width=\"1249\" height=\"885\" src=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021.png\" class=\"img-responsive wp-image-10534\" srcset=\"https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021-200x142.png 200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021-400x283.png 400w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021-600x425.png 600w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021-800x567.png 800w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021-1200x850.png 1200w, https:\/\/www.mathsweek.ie\/2025\/wp-content\/uploads\/2021\/10\/Maths-Week-Irish-Times-Poster-191021.png 1249w\" sizes=\"(max-width: 800px) 100vw, 600px\" \/><\/a><\/span><div class=\"fusion-text fusion-text-20\"><p>This poster was distributed with the Irish Times on Tuesday 19 October 2021<\/p>\n<\/div><div class=\"fusion-text fusion-text-21\"><\/div><div class=\"fusion-content-boxes content-boxes columns row fusion-columns-1 fusion-columns-total-1 fusion-content-boxes-4 content-boxes-icon-with-title content-left\" data-animationOffset=\"100%\" style=\"margin-top:0px;margin-bottom:0px;\"><style type=\"text\/css\">.fusion-content-boxes-4 .heading .content-box-heading {color:#191919;}\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover .heading .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover .heading .heading-link .content-box-heading,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .fusion-read-more:hover:after,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .fusion-read-more:hover:before,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .fusion-read-more:hover,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::after,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover.link-area-box .fusion-read-more::before,\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover .icon .circle-no,\n\t\t\t\t\t.fusion-content-boxes-4 .heading .heading-link:hover .content-box-heading {\n\t\t\t\t\t\tcolor: #e9a825;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover .icon .circle-no {\n\t\t\t\t\t\tcolor: #e9a825 !important;\n\t\t\t\t\t}.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button {background: #d6ad5a;color: #785510;background-image: -webkit-gradient( linear, left bottom, left top, from( #e8cb90 ), to( #d6ad5a ) );background-image: linear-gradient( to top, #e8cb90, #d6ad5a )}.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box.link-area-box-hover .fusion-content-box-button .fusion-button-text {color: #785510;}\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon > span {\n\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t}\n\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover .heading .icon > span {\n\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t}<\/style><div class=\"fusion-column content-box-column content-box-column content-box-column-1 col-lg-12 col-md-12 col-sm-12 fusion-content-box-hover content-box-column-last content-box-column-last-in-row\"><div class=\"col content-box-wrapper content-wrapper link-area-box icon-hover-animation-fade\" style=\"background-color:rgba(255,255,255,0);\" data-animationOffset=\"100%\"><div class=\"fusion-clearfix\"><\/div><div class=\"content-container\" style=\"color:#707070;\">\n<p><b><span data-contrast=\"auto\">LIVING ROOM:\u00a0<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Did you know that your game console or your TV in standby mode still uses electricity? The standby mode for a TV can consume up to 20% of the energy consumed by the appliance when it is on.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Electricity usage is measured in kilowatt-hours (kWh). If an appliance of 1 kilowatt (1000 watts) power runs for an hour it uses 1 kWh.\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">If your console on standby uses 1 watt of power, and you keep it in that mode for an average of 16 hours a day, how many kWh would it consume in a year? How much energy would be wasted if everyone in your class also did this?<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">BICYCLE:<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">\u00a0It is better to use public transport than for us all to use cars. Can you think why? Cycling or walking, if it is safe to do so, is even better for our climate and our health.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">You need to arrive at school on time at 9 o\u2019clock and your school is 1 km away. You know that walking quickly you can cover 100 meters in 1 minute. When do you need to leave your house?<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"auto\">CAR:\u00a0<\/span><\/b><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Cars that run on electricity have no emissions, but the overall benefit to the environment depends on the sources of the electricity used to charge their batteries and how these batteries are made and finally disposed.<\/span><span data-ccp-props=\"{\">\u00a0<\/span><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">A typical family car might emit 112 grams of CO<\/span><span data-contrast=\"auto\">2<\/span><span data-contrast=\"auto\"> for every kilometre driven. A typical car drives 17,000 kilometres. How much CO<\/span><span data-contrast=\"auto\">2<\/span><span data-contrast=\"auto\"> would you expect to be released in a year by that car?<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">\n\t\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .heading-link:hover .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box:hover .heading-link .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-link-icon-hover .heading .icon i.circle-yes,\n\t\t\t\t\t\t.fusion-content-boxes-4 .fusion-content-box-hover .link-area-box-hover .heading .icon i.circle-yes {\n\t\t\t\t\t\t\tbackground-color: #e9a825 !important;\n\t\t\t\t\t\t\tborder-color: #e9a825 !important;\n\t\t\t\t\t\t}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-16 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-bottom:20px;width:100%;\"><div class=\"fusion-separator-border sep-double\" style=\"border-color:#eaeaea;border-top-width:1px;border-bottom-width:1px;\"><\/div><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-22\"><h1>Answers<\/h1>\n<p><strong>BEDROOM<\/strong> [24 cm]<\/p>\n<p><strong>BATHROOM <\/strong>[45 l]<\/p>\n<p><strong>KITCHEN<\/strong> [360 kg]<\/p>\n<p><strong>LIVING ROOM <\/strong>[5.84 kWh]<\/p>\n<p><strong>BICYCLE <\/strong>[8:50]<\/p>\n<p><strong>CAR <\/strong>[1904 kg]<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-17 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-align-block\"><a class=\"fusion-button button-flat fusion-button-default-size button-darkgreen button-1 fusion-button-default-span fusion-button-default-type\" target=\"_self\" href=\"https:\/\/www.mathsweek.ie\/2025\/posters-2021\/\"><span class=\"fusion-button-text\">Back to Posters<\/span><\/a><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"class_list":["post-10533","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Irish Times Maths Week Poster &#8211; MATHS WEEK IRELAND<\/title>\n<meta name=\"description\" content=\"Maths Week will take place from 11 - 19 Oct. 2025. 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