Exercise for the reader
More from Chalkdust

Mapmatics
We review the third of this year’s nominees for Book of the Year
How to Expect the Unexpected
We review the fifth of this year's nominees for Book of the Year
Prize crossnumber, Issue 14
Win a £100 Maths Gear goody bag by solving our infamous puzzle
Solutions to recent puzzles
Looking back at puzzles about complex numbers, tic-tac-toe, and the Eggnog Mystery
Superegg
How optimising the space around a circular monument is related to supereggs
Puzzles about calculus
Can you solve these puzzles about differentiation and integration?
