## permutation

**Colva Roney-Dougal**and

**Vincent Vatter**explain, taking us on a journey from waiters sorting pancakes, via one of the richest men in the world, to the genetic similarities of mice and humans.

**Burkard Polster**and

**Marty Ross**explain why, and explore the maths behind bell ringing.

**Colva Roney-Dougal**explores the maths, from chaos to group theory.

Computer scientists prove how long it should take you to solve Rubik's cube

**Emily Dixon**takes a break and discovers that codes are not just for sleuths.