More from Chalkdust
- Humbug sets the fourth puzzle. Can you solve it?
- Space-filling curves, cheating at cards and automated joke generation feature in our latest edition. Plus all your favourite puzzles & columns.
- Celebrate the launch of issue 11 by taking part in our puzzle hunt
- £100 of MathsGear goodies to be won if you can solve it
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- Grant applications, musical media and last-minute Olympics training are the topics readers have sent in to the professor's postbox this issue