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# I came across Polygonal Number Theory in my studies, please can someone explain it to me?

2 years ago

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Bret Wyman

1 Answer

David B
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GCSE / National 5 Maths, Edexcel, AQA, SQA. Qualified Head of Maths

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Big question! In short, it's a theorem suggested by Fermat, but since proved, that every positive integer can be written as the sum (add) of 3 (or fewer) triangle number, 4 (or fewer) square numbers, 5 (or fewer) pentagonal numbers etc, relating to the number of sides.

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