Image: Chalkdust.
More from Chalkdust
Poly-π
Clem Padin calculates π, but not as we know it
Significant figures: David Singmaster (1938–2023)
Colin Wright remembers the puzzle giant with a passion for sharing
Cat among the pigeons
Some interesting observations with the pigeonhole principle
Crossnumber winners, issue 04
Are you a winner?Prize crossnumber, Issue 03
Be in for a chance to win a £100 goody bag if you can solve our fiendish crossnumber
Can you solve these puzzles?
While we work on issue 2