More from Chalkdust
- Colin Wright remembers the puzzle giant with a passion for sharing
- An unexpected way to beat the odds in this classic game
- John Dore and Chris Woodcock join the dots
- Finding the best picture at the Leaning Tower of Pisa is all about the maths rather than the pose!
- Can you wear them and be taken mathematically seriously?
- Do we have a natural limitation on the number of friends that we have?