Without doing any calculation, find the numbers which are surely not perfect squares. $(iii) 408$

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Solution

Determine if the given number $408$ is a perfect square or not.
Natural numbers ending with the digits $0, 2, 3, 7$ and $8$ are not perfect squares.
Unit place digit of the number $408$ is $8$
Hence, $408$ is not a perfect square.

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Similar questions

Without doing any calculation, find the numbers which are surely not perfect squares.

(i) 153 (ii) 257

(iii) 408 (iv) 441

Without doing calculation, find the numbers which are surely not perfect squares.
(i) $153$
(ii) $257$
(iii) $408$
(iv) $441$

Question 2 (iii)
Without doing any calculation, find the numbers which are surely not perfect squares:

408

153

257

408

441

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