alleryOn the number line shown, which one of the marked numbers is irrational? 
A$-2.3$
B$0.6$
C$\sqrt{2}$
DAll three are irrational
Answer & Solution
Correct answer: C. $\sqrt{2}$
$-2.3$ and $0.6$ are terminating decimals, so they are rational numbers.
$\sqrt{2}$ is a non-terminating, non-recurring decimal, so it is irrational.
**Hence only $\sqrt{2}$ is irrational.**
Keep practising Quantitative Aptitude
Browse all Quantitative Aptitude questions for CAT, or explore more Quantitative Reasoning topics.