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CBSE Class 8 Mathematics Question 1 of 9

A Square and A Cube — Question 1

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1
Question
Which of the following numbers are not perfect squares? (i) 2032 (ii) 2048 (iii) 1027 (iv) 1089
Answer

(i) 2032 is not a perfect square, as a number ending with 2 can not be a perfect square. (ii) 2048 is not a perfect square, as a number ending with 8 can not be a perfect square. (iii) 1027 is not a perfect square, as a number ending with 7 can not be a perfect square. (iv) 1089 ends in 9 at the unit’s place. Hence, it is a perfect square.