Question

Which of the following number is different from others?

• A. $\sqrt{5}$
• B. $\sqrt{8}$
• C. $\sqrt{13}$
• D. $\sqrt{16}$

Answer 1

The correct option is D $\sqrt{16}$

Out of $\sqrt{5}$, $\sqrt{8}\left(2\sqrt{2}\right)$ ,$\sqrt{13}$ , $\sqrt{16}$

Only $\sqrt{16}=4$ is rational number which can be written in the form of $\frac{p}{q}$ where $p=4$ and $q=1$ while others are irrational number.