Which of the following cannot be a perfect square?

3249

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2468

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1936

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1089

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Solution

The correct option is B
2468

The unit digit of a perfect square can be only 0, 1, 4, 5, 6 or 9.
Thus, the number has 2, 3, 7 or 8 cannot be a perfect square number.
So, 2468 cannot be a perfect square number.

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Which of the following is definitely not a perfect square?

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