Question

Rational number will be

• A. $\sqrt{2}$
• B. $\sqrt{3}$
• C. $\sqrt{9}$
• D. $\sqrt{7}$

Hint:

A rational number can always be expressed as a fraction $\dfrac{p}{q}$ with integers $p$ and $q$. Perfect squares like 4, 9, 16, etc., have rational square roots.

Answer 1

The Correct Option is C

Step 1: Understanding rational numbers.
A rational number is any number that can be expressed in the form $\dfrac{p}{q}$, where $p$ and $q$ are integers and $q \neq 0$.
Step 2: Evaluating each option.
(A) $\sqrt{2}$ = 1.414... (irrational)
(B) $\sqrt{3}$ = 1.732... (irrational)
(C) $\sqrt{9}$ = 3 (rational)
(D) $\sqrt{7}$ = 2.645... (irrational)
Step 3: Conclusion.
Among the given options, only $\sqrt{9} = 3$ is a rational number.