Question

Which of the following is a rational number?

• A. √2
• B. ∏
• C. 6/0
• D. 4.8

Answer 1

The correct option is D

4.8

A rational number is a number which can be written in the form of $\frac{p}{q}$ where $p$ and $q$ are Integers and $q$ is not equal to zero. A number is also said to be rational if the decimal expansion is either terminating or non-terminating recurring in nature. The value of $\pi$ is 3.14159265358...., the digits neither terminate nor recur and hence not rational. $\sqrt{3}$ = 1.73205080756887...., the digits again are non-recurring and non-terminating; so it is not rational. $\frac{3}{0}$ is not defined and for a rational number, the denominator should be non-zero. But $\frac{31}{2}$ satisfies all the properties of a rational number.