More from Chalkdust
Hiding in plain sight
Axel Kerbec gets locked out while exchanging keys
Summer puzzles
Have a go at these puzzles, adequate for your holidays!
Slide rules: the early calculators
When slide rules used to rule... find out why they still do
What’s hot and what’s not, Issue 04
Don't be left behind... more mathematical fashion advice
Top Ten vote: Colours of chalk
Vote for your favourite colour of chalk for Issue 04: is it white, yellow, or the Post Office Tower?
100 years with the Sierpinski triangle
Three ways to obtain and generalise a beautiful fractal