More from Chalkdust
The problem with addition
It doesn’t add up for Patrick Creagh
Christmas puzzle #2: A Christmas nonogram
Puzzle #2 in our 2020 Christmas puzzle series
On the cover: dragon curves
Read more about the fire-breathing curves that appear on the cover of issue 05
The mathematics of tea-making
When-to-add-milk confusion and other related matters
The wonders of mathematical crochet
Hyperbolic surfaces, Klein bottles and more
Crossnumber winners
Are you a winner?