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Question

Which of the following is a perfect square?
  1. 9277
  2. 2401
  3. 4602
  4. 9748


Solution

The correct option is B 2401
All perfect squares end with 1, 4, 5, 6, 9 or 00.
A number that ends with 2, 3, 7 or 8 cannot be a perfect square.
So, 4602, 9277, and 9748 can’t be perfect squares.
2401 ends with 1, so it can be a perfect square.
 

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