WBCS.LIVE practice question

What is the least number to be added to 1500 to make it a perfect square?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 12
  2. 15
  3. 21
  4. 25

Correct answer and explanation

Correct answer: 21

Explanation: āœ… Correct Answer: C. 21 šŸ“š Explanation: To find the number to be added to 1500, we check the nearest perfect squares. The square of 38 is 1444, and the square of 39 is 1521. To reach 1521 from 1500, we must add 21. Therefore, 21 is the least number that makes 1500 a perfect square. This is a basic test of seeing perfect square sequences.