Correct Answer - Option 2 : 101
Given:
4523 + least number = Perfect square
Calculation:
Nearest square number to 4,523 is 4,489 and 4624
4,489 is a square of 67,
4,624 is a square of 68
4,489 is smaller than 4,523,
So it is not acceptable.
Least number to be added,
⇒ 4624 – 4,523 = 101
∴ Least number should be added is 101.