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Find square root of 169.(a) 13(b) 14(c) -14(d) 12This 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»

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.



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