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Without doing any calculation, find the numbers which are surely not perfect squares. i. 153 ii. 257 iii. 408

Without doing any calculation, find the numbers which are surely not perfect squares. i. 153 ii. 257 iii. 408 

Grade:12th pass

1 Answers

Harshit Singh
askIITians Faculty 5964 Points
one year ago
Dear Student

We know that natural numbers ending with the digits 0, 2, 3, 7 and 8 are not perfect square.

i. 153⟹ Ends with 3. ∴, 153 is not a perfect square

ii. 257⟹ Ends with 7 ∴, 257 is not a perfect square

iii. 408⟹ Ends with 8 ∴, 408 is not a perfect square


Thanks

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