Question

Which of the following is not an irrational number?
(i) $\sqrt{2}$
(ii) $\pi$
(iii) $\sqrt{3}$
(iv) 4.8

Answer 1

$\sqrt{2}=\mathrm{1.414213562373095...}$, is non-recurring and non-terminating. So it is an irrational number.

The value of $\pi$ is 3.14159265358..., the digits neither terminate nor recur and hence it is an irrational number.


$\sqrt{3}$=1.732142857…, is non-recurring and non-terminating. So it is an irrational number..

4.8 = $\frac{48}{10}$ satisfies all the properties of a rational number. Therefore, it is a rational number.