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Videep Ekbote from The Mothers International School, New Delhi

Subject :IMO Class : Class 6

Observe the following patterns. Then find the sum of 1 + 3 + 5 + 7 + 9 + ... + 19.

1 = 1 × 1 = 1

1 + 3 = 2 × 2 = 4

1 + 3 + 5 = 3 × 3 = 9

1 + 3 + 5 + 7 = 4 × 4 = 16

1 + 3 + 5 + 7 + 9 = 5 × 5 = 25

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(A) 121

(B) 81

(D) 64

Ans 1: (Master Answer)

Admin from revisewise, Noida

The correct answer is C.