Question

Which of the following numbers are irrational?

A) Negative eight and 2183 ten thousandths
B) One third pi
C) The cube root of twenty-five
D) Nine plus the square root of four
Select all correct answers from the options below:
a) A and B
b) B and C
c) C and D
d) A and D

Answer 1

b) B and C.

Explanation:

B) pi is irrational so pi/3 is also irrational.

C)

A is a fraction and D = 9 + 4 = 13, so they are both rational.