Which of the following is irrational?
Practice this question from Chapter Mock 1: Number System, Simplification and Approximation, with options and an explanation.
Question
Which of the following is irrational?
Option A — Correct answer
$\sqrt2$
Correct choice.
Option B
$\frac35$
Option C
$-6$
Option D
$0.125$
Explanation
A rational number can be written as a ratio of integers. $\sqrt2$ is non-terminating and non-repeating, so it is irrational.