Question

How many non square numbers are there between $5^2$ and $7^2$?

• A. 32
• B. 25
• C. 23
• D. 22

Answer 1

The correct option is C 23

There are 2n non perfect square numbers between the squares of the numbers n and n + 1.
The number between $5^2$ and $6^2$ = $2\times 5=10$
The number between $6^2$ and $7^2$ = $2\times 6=12$
The number between $5^2$ and $7^2$ is
10 + 12 = 22
There are 22 non perfect square numbers between $5^2$ and $7^2$.