We must start and end at one of the bottom points
More from Chalkdust
The Secret Lives of Numbers
We review the fourth of this year's nominees for Book of the Year
I don’t like science fiction
Peach Semolina admits her true feelings about science fiction, and delves into the maths of quantum teleportation.
Crossnumber winners, issue 10
Did you solve it?
Black Mathematician Month 2018
We look back at last year's Black Mathematician Month, and give a preview of what to expect this October.
Seeing double
Take a ball, divide it into parts, glue them back and get two identical copies of your ball!
Christmas cracker joke III
Behind today's door... A joke!