Question

(i) Express 49 as the sum of 7 odd numbers.
(ii) Express 121 as the sum of 11 odd numbers
11​

Answer 1

(1) 1+3+5+7+9+11+13 = 49.
(2)1+3+5+7+9+11+13+15+17+19+21 = 121.

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Answer 2

: Required Answer

i) We know, sum of first n odd natural numbers is n2 . Since,49 = 72

➝ 49 = sum of first 7 odd natural numbers = 1 + 3 + 5 + 7 + 9 + 11 + 13

ii) Since, 121 = 112

➝ 121 = sum of first 11 odd natural numbers = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21