Which of the following could be a perfect square?

1681

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23453

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222222

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1057

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Solution

The correct option is A
1681

Perfect squares cannot have 2, 3, 7 or 8 in their unit's place.
In the given options only 1681 does not end with a number other than these.

The perfect squares of numbers ending in 1 and 9 have 1 at their unit's place.

Thus, 1681 could be a perfect square of an integer ending with either 1 or 9.

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Similar questions

Which of the following cannot be a perfect square?

If A, B, C, ..., X, Y, Z represents digits, which of the following could be a perfect square?

Which could be the remainder among the following when a perfect square is divided by 8?

A. 1

B. 3

C. 5

D. 7

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