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Differences of Squares of Triangular Numbers and Converse

How many squa...

Question

How many squares are there in a chessboard? Ans. ______________.

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Solution

$N o . o f s q u a r e s = S u m o f s q u a r e s o f 1^{s t} 8 n a t u r a l n u m b e r s = \frac{8 \times 9 \times 17}{6} = 204$

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Differences of Squares of Triangular Numbers and Converse

Standard VII Mathematics

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