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Metallic numbers: Beyond the golden ratio

You've heard of the golden ratio. But have you heard of the silver ratio, the bronze ratio, indeed the whole infinite family of metallic siblings? If not then read this.

Football sweepstakes: Levelling the playing field

With just a few months to go until the UEFA European Cup, here's how you can make your office sweepstake a lot fairer and more exciting.

Maths in a minute: Hawking radiation

Nothing, not even light, can escape from a black hole. Or can it? Find out about one of Stephen Hawking's most radical results.

Maths in a minute: The information paradox

The laws of nature say that information can never be lost, so what happens when a black hole swallows it? Explore a mystery that intrigued Stephen Hawking until the end of his life.

Why are sunsets red?

Wim Hordijk provides the answer with a look at the maths and physics of waves.

Perfectly even

After 2000 years of searching we only know of 51 perfect numbers and they're all even. What else do and don't we know about these rare and precious jewels of maths?

Perfectly odd

Nobody has ever found an odd perfect number. So do they exist at all and, if yes, what do they look like?

Sharing cakes

How should you share the profits of a deal to make sure everyone gets their fair due? This ancient puzzle shows the answer is not always obvious.