Puzzles
Maths Week 2017 Teaser: Test your skill – can you figure this out? Mary has twice as many brothers as sisters while her brother John has twice as many sisters as brothers. How many children are in their family? See answer here 

Maths Week Puzzles 2016 
The Irish Times will be running puzzles for Maths Week. To see puzzles and solutions for 2016 click here. 
Moving Coin / Counter puzzles 
You can draw out the grid or print it out and you can use coins or counters and you have a fun puzzle. See here for full details 


Arrange the numbers 119 in the grid below so that each row, column and diagonal adds to 38.
You can only use each number once and every number must be used.
Teacher's note: the difficulty of this puzzle can be altered by providing some of the numbers as a starting point. Logic and reasoning will then allow pupils to complete the puzzle!
The Handshake Puzzle
Arturas, Liam, Nina and Samira meet up. Each person shakes hands with every other person once.
How many handshakes are there in total?
How many messages?
Pete, Sarah, Matt, Amy and Luke are all friends. Each of them sends one text message to each other person.
How many messages are sent in total?
World Cup Qualifiers
There are 6 teams in a group. Each team plays every other team twice.
How many games are there in total?
Attacking the Castle
Expanding Car Park
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