Without doing any calculation, find the numbers which are surely not perfect squares. $(iv) 441$

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Solution

Determine if the given number $441$ is a perfect square :
Natural numbers ending with the digits $0, 2, 3, 7$ and $8$ are not perfect squares.
Unit place digit of the number is $1$ .
Hence, $441$ is a perfect square.

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Question 2 (iv)
Without doing any calculation, find the numbers which are surely not perfect squares:
441

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

153

257

408

441

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

(i) 153 (ii) 257

(iii) 408 (iv) 441

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