Puzzles

Place the numbers 1 to 9 in the boxes so that each side of the triangle adds up to 20.

Neat little code-breaker. Can you come up with others?

How many moves to get all the coins on heads?

Finding pairs of numbers that add up to square numbers. Tricky!

A calculator is needed for this fun challenge.

How many ways of making 15. Have you got all of them?

Can you make prime numbers by adding two square numbers?

Turn your calculator upside down to read the words!