Question

Just by looking at the numbers, identify which of the following can not be a perfect square.

• A. 382
• B. 484
• C. 576
• D. 529

Answer 1

The correct option is A

382

Numbers ending with 2, 3, 7, or 8 at unit's place are never perfect squares.
Estimation without actually finding roots:
484 can be the perfect square of a number ending with 2 or 8
576 can be the perfect square of a number ending with 4 or 6
529 can be the perfect square of a number ending with 3 or 7