Question

Which of the following is/are rational numbers?

• A. 2
• B. 2.5
• C. $\frac{4}{5}$
• D. 3.33333......

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A 2
B 2.5
C $\frac{4}{5}$
D 3.33333......

By definition, a number which can be expressed as $\frac{p}{q}$, where p and q are integers and $q\ne 0$ is a rational number.

$\therefore \frac{4}{5}$ is a rational number.

2 can be written as $\frac{2}{1}$.

2.5 can be written as $\frac{25}{10}$ i.e., $\frac{5}{2}$.

Similarly, 3.3333..... can be written as $\frac{10}{3}$

Hence, all are rational numbers.