Question

Find square root of 169.

(a) 13

(b) 14

(c) -14

(d) 12

This question was posed to me in final exam.

My doubt stems from Finding Square Roots topic in portion Squares and Square Roots of Mathematics – Class 8

Answer 1

The correct choice is (a) 13

Explanation: Here we can simply find our answer by taking square root of the number \(\sqrt{169}\)=13. There can be some smart ways to find the answer without calculating the roots. A square of number ending with 9 is a square of a number ending with 3. There is only one option ending with 3. Therefore the correct answer is 13 and the others are incorrect.