Find the least number that must be added to 5600 to make it a perfect square.

Correct option is C

Given:
Number = 5600
Solution:
Find the square root of 5600 to identify the closest perfect squares bounding it.
$$74^2$$​= 5476
$$75^2$$​= 5625
Since 5600 lies between 5476 and 5625, the next perfect square after 5600 is 5625.
Calculate the difference to find the least number to be added:
5625 - 5600 = 25
Final Answer
So the correct answer is (c)