## 14

Cookies are set out on a rectangular grid. The bottom left cookie is poisoned.

Two players take it in turn to "chomp" - that is, to eat one of the remaining cookies, plus all the cookies above and to the right of that cookie.

**Ian Garbett**discusses radioactive decay.

**Rob Eastaway**shows us how mathemagicians trade off the fact that you can usually predict precisely the outcome of doing something in mathematics, but only if you know the secret beforehand.

**Matthew Keeling**describes some of the mathematical developments that have improved our understanding and predictive ability.