## Maths in a minute

Want facts and want them fast? Our *Maths in a minute* series explores key mathematical concepts in just a few words. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.

Here's one of the most elegant proofs in all of maths. Rejoice in its simplicity!

Why a positive test result doesn't necessarily mean you have the disease.

Here's the ancient proof that there are infinitely many prime numbers.

Why a DNA match doesn't necessarily prove your guilt.