More from Chalkdust
Forest fires
Steven Lockwood finds polygonal numbers hidden in a spreading fire
Top Ten: Matrices
The definitive chart of the best matrices
Review of Problem Solving in GCSE Mathematics
We have a go at the puzzles in Daniel Griller’s new book
In conversation with Eugenia Cheng
We chat to the author of the best-selling book How to Bake Pi and pioneer of maths on YouTube
Top ten vote issue 07
Vote for your favourite unit
Going once, going twice… game theory?
A quick look at how to get the most bang for your buck the next time you're in a bidding war