More from Chalkdust
- David Sheard sets the third puzzle. Can you solve it?
- £100 of MathsGear goodies to be won if you can solve it
- David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
- Coffee, Brexit and badgers are among the topics of discussion in this issue's Dear Dirichlet advice column
- Elizabeth A Williams falls off a log
- Find out more about the patterns on the cover of Issue 07