Which of the following is/are not a square number?

(i) 48
(ii) 1653
(iii) 121
(iv) 627

(i), (ii), (iv)

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(ii), (iv)

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(i), (ii), (iii)

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(iii)

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Solution

The correct option is A
(i), (ii), (iv)

Square numbers never end with 2, 3, 7 or 8.

Also, 121 = $11^{2}$

So, it is a square number.

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Find the largest perfect square factor of each of the following numbers:

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