# 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.

Whether you want to understand viruses, win at lotto or solve a rubik's cube – you'll need some help from combinatorics.

A hundred pounds is a lot more to someone who's poor than to a millionaire. But how do you measure such differences? Utility theory has the answer.

Find out about the beautifully intuitive concept that lies at the heart of calculus.

When you let go of the notions of distance, area, and angles, all you are left with is holes.

Bridging the gap between the microscopic snd the macroscopic.

How long do you have to wait for more than one thing to happen?

How long do you have to wait for something to happen?