More from Chalkdust
Top Ten vote issue 17
Have your say
Chalkdust Book of the Year 2022
We announce the shortlist of our favourite maths-themed books of last year
Crossnumber winners, issue 11
Did you solve it?
How do calculators do trigonometry?
W.L. Feldhusen explains the obscure sine-finding trick hiding inside your calculator!
To share, or not to share
A tragic love story of shares and viral songs. To share, or not to share...
Finding the edge of your images
How can we identify objects in photos, to diagnose cancer or predict the weather? Using gradients!