Question

Which one of the following is an irrational number?

Options

• `sqrt (16/25)`

• `sqrt 5`

• `3/9`

• `sqrt 196`

Answer 1

`bbsqrt 5`

Explanation:

Since, 

`sqrt(16/25) = 4/5` is a rational number;

`3/9` is a rational number,

`sqrt 196 = 14` is a rational number; and 

`sqrt 5` is an irrational number.