## 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.

Continued fractions reveal the good, the bad and the beautiful side of numbers.

Why there are only three regular polygons you can tile a wall with.