puzzle

In how many ways can you make it up the stairs?

This week would have been the 100th birthday of Martin Gardner, who is deservedly credited with turning on several generations of people worldwide to the pleasures of maths! To mark the occasion here are some favourite puzzles that, apart from being fun, also lead to some serious maths.

Making a very special number out of primes.

It's a gold level Hypernion!

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