Puzzles
Maths Week Puzzles 2016 
Once again the Irish Times will be running puzzles for Maths Week. Each day will at 12 pm we will give you the answer and the method here. 


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
A client wants to double the size of his car park (shown below). He insists on retaining a square shape and as many of the trees as possible.
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