Question

If there are 27912 people to be arranged in the form of a square, how many people should be left out?

• A. 7
• B. 12
• C. 18
• D. 23

Answer 1

The correct option is D 23

By long division method, the square root of 27912 can be estimated as follows.
Thus, 27912 is 23 more than ${167}^2$.
Hence, 23 people must be left out so that the remaining people can be arranged in the form of a square.