Question

Estimate $\sqrt{623}$ to its nearest whole number.

• A. 24
• B. 25
• C. 26
• D. 23

Answer 1

The correct option is B 25

By considering $\sqrt{576}<\sqrt{623}<\sqrt{625}$
$\Rightarrow 24<\sqrt{623}<25$
So, 24 and 25 are the whole numbers that are closer to $\sqrt{623}$.

As $\sqrt{623}$ is much closer to $\sqrt{625}$ than $\sqrt{576}$, it can be estimated to 25.

The correct option is B.