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Sums of Squares and Pyramidal Numbers
Published online by Cambridge University Press: 22 September 2016
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In the June 1981 Gazette, Ian Anderson discussed several ways of finding the sum of the first n squares:
His methods are mostly algebraic and I wondered if there were more geometric ways of obtaining the formula. After some time, I have found several methods which I present here. These methods are based on counting balls in piles and are suitable for exploratory activity at school level.
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- Copyright © Mathematical Association 1982
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