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NEW! Pop-math book club
Do you have lots of unread pop math books on your shelves? Join our new monthly online book club!
Crossnumber winners, issue 09
Did you solve it?
Baking a Menger sponge sponge
Sam Hartburn bakes your favourite fractal
Making your own papercupter
Next time you are finished using a paper cup, create your own papercupter!
Roots: the legacy of Fibonacci
More than spirals and rabbits, Fibonacci gave us something much more fundamental.
Crossnumber winners
Are you a winner?