More from Chalkdust
What’s hot and what’s not, Issue 23
Fashion is fleeting, Chalkdust regulars are not.
Chalkdust Book of the Year 2024
We announce the shortlist of our favourite maths-themed books of last year
I’m counting on it
Joe Celko looks at four different abacuses used throughout history
Solutions to recent puzzles
Looking back at puzzles about complex numbers, tic-tac-toe, and the Eggnog Mystery
Taking the (mathematically) perfect picture at the Leaning Tower Of Pisa
Finding the best picture at the Leaning Tower of Pisa is all about the maths rather than the pose!
Advent puzzles I
Behind the second door of the advent calendar, there is a puzzle