Question

a) 7056 b)3969 c) 5478 d)4624 which of the following numbers is not a perfect square?​

Answer 1

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If any of the following number is perfect square it should end with

1,4,9,6,5.

Since 5478 doesnt end with these numbers hence it should be the answer

C) is the answer

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Answer 2

5478 is not a perfect square.

If you can't get the answer use prime factorization and you will get the answer.