Sam Kay reflects on building a universe

£100 of MathsGear goodies to be won if you can solve it

Lucy Rycroft-Smith reflects on the use of this well-established measurement

Solve this and you could be the lucky winner of a Chalkdust T-shirt

Problem solving 101, proof by storytelling, plus the return of all your favourite fun pages in our autumn 2016 edition.

Moonlighting agony uncle Prof. Dirichlet answers more of your personal problems