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Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?

This task requires learners to explain and help others, asking and answering questions.

Find and explain a short and neat proof that 5^(2n+1) + 11^(2n+1) + 17^(2n+1) is divisible by 33 for every non negative integer n.

Can you create a Latin Square from multiples of a six digit number?

Mathmo is a revision tool for post-16 mathematics. Give yourself a mathematical workout!

The answer is $5x+8y$... What was the question?

These five clowns work in pairs. What is the same and what is different about each pair's faces?

Can you make a square from these triangles?