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- Sophie Maclean and David Sheard speak to a very top(olog)ical mathematician!
- David Sheard sets the third puzzle. Can you solve it?
- David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
- 21 simple steps to draw your own Islamic pattern!
- When you get tired of using your calculator for numbers, why not use it for words?