A doodle with its vertices slightly “exploded”: the doodle is simply a distorted circle.
More from Chalkdust
Chalkdust issue 11 puzzle hunt #4
Humbug sets the fourth puzzle. Can you solve it?
Top ten vote issue 06
Vote for your favourite mathematical celebration day
How to make: a hyperbolic plane
A great way to waste a lot of paper
Slide rules: the early calculators
When slide rules used to rule... find out why they still do
To share, or not to share
A tragic love story of shares and viral songs. To share, or not to share...
Cracking the Guess Who? board game
Maths and Decision Theory to be the best at playing Guess Who?