Question:
Which of the following is irrational?
(a) $0.15$
(b) $0.01516$
(c) $0 . \overline{1516}$
(d) $0.5015001500015$.
Solution:
Given decimal numbers are
$0.15,0.1516,0 . \overline{1516}$ and $0.501500115000115 \ldots$
Here the number $0.501500115000115 \ldots .$ is non terminating or non-repeating.
Hence the correct option is $d$.