# Which of the following is an irrational number?

Question:

Which of the following is an irrational number?
(a) 3.14
(b) 3.141414...
(c) 3.14444...
(d) 3.141141114...

Solution:

(d) 3.141141114...

Because 3.141141114... is neither a repeating decimal nor a terminating decimal, it is an irrational number.