More from Chalkdust
How to write a crossnumber
Matthew Scroggs explains how to get digits all riled upChalkdust issue 21 – Coming 17 March
Pre-order your copy of issue 21 now!A day in the life: universities
We talk to four mathematicians at different stages of their careersIssue 13 launch art project
Issue 13 is here! Find out how to get involved with our mathematical art launch projectPrize crossnumber, Issue 10
Can you solve it?The sieve of Eratosthenes: revisited
How can we teach people about the sieve in a way that helps them best understand prime numbers?