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Rules of the crossnumber

  • One randomly selected correct answer will win a £100 Maths Gear goody bag, including non-transitive dice, a Festival of the Spoken Nerd DVD, and much, much more. Three randomly selected runners up will win a Chalkdust T-shirt. Maths Gear is a website that sells nerdy things worldwide, with free UK shipping.
  • To enter, enter the mean of all the digits in the row marked by arrows below by 8 October 2024. Only one entry per person will be accepted. Winners will be notified by email and announced on our blog by 1 November 2024.

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