Maths B.Yagnyase Dale i class 2/7671 1 findout 42=7 Not in division method use repeated subtraction
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We know that the sum of first n odd natural numbers is n2.
(i) 49 = (7)2
Therefore, 49 is the sum of first 7 odd natural numbers.
49 = 1 + 3 + 5 + 7 + 9 + 11 + 13
(ii) 121 = (11)2
Therefore, 121 is the sum of first 11 odd natural numbers.
121 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21
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