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Adding in Rows

List any 3 numbers. It is always possible to find a subset of adjacent numbers that add up to a multiple of 3. Can you explain why and prove it?

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Magic Sums and Products

How to build your own magic squares.

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Weekly Problem 2 - 2013

Weekly Problem 2 -2013

Partitioning Revisited

Stage: 3 Challenge Level: Challenge Level:1


A possible start to work on the expansion of brackets in algebra.

It enables students to make links with shape and space and with arithmetic.

A useful follow-up to this problem could be Multiplication square and Cubes within Cubes revisited