Exercise for the reader
More from Chalkdust

On the cover: A new puzzle every day
Matthew Scroggs puts polyominoes inside polygons
That’s Mathematics
We review the first of this year's nominees for Book of the Year
Issue 16
Fields medals, iconic intersections, and things with silly names coming your way in our autumn 2022 issue! Plus all your favourite puzzles & columns.
Prize crossnumber, Issue 07
Win £100 of Maths Gear goodies by solving our famously fiendish crossnumber
Is it possible to reach absolute zero?
After 100 years, a key postulate of the third law of thermodynamics has been proven. We meet Lluis Masanes, one of the researchers responsible.
Review: Mathematical socks
Can you wear them and be taken mathematically seriously?
