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Puzzles

It's a long way to the top

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

Making a very special number out of primes.

Cross Katastrophion 1: Platinum

Cross Pandemonion 1: Gold

Cross Hypernion 1: Platinum

Katastrophion 3: Platinum

Hypernion 2: Gold

Cross HyperLogikion 1

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Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.

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