Question

What is the number of non-square numbers between the squares of 11 and 12?

• A. 22
• B. 23
• C. 24
• D. 25

Answer 1

The correct option is A

22

For any two consecutive natural numbers, n and n+1, the numbers lying in between $n^2$ and $(n+1{)}^2$ is 2n. So there are 22 (n = 11, 2n = 22) non-square numbers between 121 and 144.