RRB Technician 2013 Ques 118

Question: What is the least number to be added to 4700 to make it a perfect square?

Options:

A) 74

B) 69

C) 76

D) 61

Show Answer

Answer:

Correct Answer: D

Solution:

  • Clearly, 4700 lies between the squares of 68 and 70. Therefore, its nearest square is (69)2. So, the required number $ ={{(69)}^{2}}-4700 $ $ =4761-4700=61 $