(i) Express 49 as the sum of 7 odd numbers. (ii) Express 121 as the sum of 11 odd numbers.
(i) Express 49 as the sum of 7 odd numbers.
(ii) Express 121 as the sum of 11 odd numbers.
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We know that the sum of first n odd natural numbers is n2.
(i) 49 = 72 Therefore, 49 is the sum of first 7 odd natural numbers. 49 = 1 + 3 + 5 + 7 + 9 + 11 + 13
(ii) 121 = 112 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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