Question

Which of the following is anirrational number?

Answer 1

Irrational numbers cannot be wrtten in form a/b where b is not equal zero

A. pi is irratinonal we know that
B. that equals -2
C. that equal 0 or 0/1
D. that equals 4 or -4

answer is A

Answer 2

An irrational number is a number that cannot be written as a ratio or fraction. 

Now, we know that pi (3.14..... or π) is irrational, so with no doubt, that is the answer.