Question

We get the square of _____ number if we add first 11 odd numbers.

(a) 11

(b) 12

(c) 5

(d) 13

I got this question in exam.

Query is from Patterns in Squares of Numbers in chapter Squares and Square Roots of Mathematics – Class 8

Answer 1

Correct answer is (a) 11

Easy explanation: There is an interesting pattern in squares, when we add first n odd numbers we get n^2. So here when we add the first eleven odd numbers, we get 11^2. Hence the correct answer would be 11^2 and the other options would be incorrect.