Question

Which of the following numbers is irrational?

Select all that apply.

1.5
8/9
pi
2.3

Answer 1

all except pi are rational.

2.333... = 21/9
1.5 = 3/2

Answer 2

Answer: Third Option is correct.

Explanation:

Since we have given that

1) 1.5- it is a rational number as it can be written in
`(p)/(q)` form.

i.e.
`1.5=(15)/(10)=(3)/(2)`

2)
`(8)/(9)`- It is a rational number as it is written in
`(p)/(q)` form.

3) 2.3 - It is a rational number as it can be written in
`(p)/(q)` form.

i.e.
`2.3=(23)/(10)`

4) pi - It is irrational number as it can't be written in
`(p)/(q)` form.

Hence, Third Option is correct.