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Oranges and Lemons, Say the Bells of St Clement's

Age 11 to 14
Challenge Level Yellow star
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An excellent introduction to this sort of bellringing can be found in Ringing Elementary Minor Methods on Handbells by Frank H. King (the Cambridge University Bellringer) and in Wikipedia.

 

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The letters of the word ABACUS have been arranged in the shape of a triangle. How many different ways can you find to read the word ABACUS from this triangular pattern?

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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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