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Mechanical Mindgames

Age 16 to 18
Challenge Level Yellow starYellow star
  • Problem
  • Student Solutions

We got one of our best ever solutions to the difficult third part of this problem, by Elliott from Hockerill College. He beautifully presented his findings. You can view the full pdf here.


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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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