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4 Dom

Use these four dominoes to make a square that has the same number of dots on each side.

Pair Sums

Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?

Number Sandwiches

Can you arrange the digits 1, 1, 2, 2, 3 and 3 to make a Number Sandwich?

One to Eight

Age 11 to 14
Challenge Level

A problem in which students can apply their understanding of how prime numbers form the building blocks of numbers.

Students will need to develop strategies that help them narrow down their options and then work systematically.

You can find a similar problem on the NRICH site: Funny Factorisation