write 169 as the sum of odd number
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Squares and Square Roots. Express 169 as the sum of first 13 odd numbers. Find whether each of the following numbers is a perfect square or not? i.e. 121 = 1+3+5+7+9+11+13+15+17+19+21
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121=1+3+5+7+9+11+13+15+17+19+21
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