More from Chalkdust
Christmas puzzle #1: Christmas tree sudoku
Puzzle #1 in our 2020 Christmas puzzle seriesReview of the year 2017
What have we been up to this year?Beghilos
When you get tired of using your calculator for numbers, why not use it for words?You don’t need permission to be a great mathematician!
Nira Chamberlain, one of the UK's top 100 scientists, shares his experiences as a black mathematician.Maths at EMF camp
Exploring the maths on offer at this year's UK hacker festival.Fun with water bells
Explaining how surface tension makes water form surprising shapes