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This activity did not lend itself to lots of solutions being sent in, being an open exploration of the blocks. However it usually does involve a lot of good thinking and perhaps recording does not play such an important role. It challenges us to think hard about the words we use to describe the blocks.

Please do send us any ideas you have had, even if they are not "complete".


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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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