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Age 7 to 11
Challenge Level

We haven't received any solutions to this problem and of course what you find out might depend on what you decided to investigate.

However, we would love to hear about anything you have discovered. Share your ideas by emailing primary.nrich@maths.org  Please don't worry that your solution is not "complete" - we'd like to hear about anything you have tried. Teachers - you might like to send in a summary of your children's work.

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