We must start and end at one of the bottom points
More from Chalkdust
Issue 14
Venn diagrams, retrograde chess, and behind-the-scenes Christmas lectures all feature in our autumn 2021 edition. Plus all your favourite puzzles & columns.
How do calculators do trigonometry?
W.L. Feldhusen explains the obscure sine-finding trick hiding inside your calculator!
Mathematics for the three-fingered mathematician
Robert J Low flips one upside down.
Hedy Lamarr: Hollywood star and secret inventor
James Grime gets intimate with 'the most beautiful woman in the world' from the golden age of Hollywood
The mathematics of tea-making
When-to-add-milk confusion and other related matters
Introducing the Cuboku
Can you solve our 3D Sudoku puzzles?