Question

Which of the following is a rational number?

• A. $\sqrt{7}$
• B. $\sqrt{25}$
• C. $\sqrt{\frac{25}{5}}$
• D. $\sqrt{\frac{7}{2}}$

Answer 1

The correct option is B

$\sqrt{25}$

Determine the Rational Number.

A rational number is simply a number of arithmetic that can be expressed as the quotient or fraction $\frac{p}{q}$ of two integers, a numerator $p$, and a non-zero denominator $q$.

Here,

$$\begin{gathered} \sqrt{25}=\sqrt{5^2} \\ \Rightarrow =\frac{5}{1} \\ \Rightarrow =5 \end{gathered}$$

So, the $"5"$is a rational number.

Hence, the correct choice is “Option B”.