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What is the square roots of a three digit number ending with one?(a) 1(b) 11(c) 121(d) 9I had been asked this question in semester exam.My question comes from Finding Square Roots topic in section Squares and Square Roots of Mathematics – Class 8

Answer»

Correct OPTION is (b) 11

To elaborate: If a three digit number which is ending with 1 the square ROOT would be ending with 1 or 9. Here all the options either have 9 or 1 at the ending. The option which has 1 cannot be the ANSWER since the square wouldn’t be a three digit number. Similarly with the options 121 and 9 their square won’t be three digit NUMBERS either. So, the correct answer will be 11, the square of 11 is a three digit number and ends with 1.



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