Which number is irrational?
a)
9
b)
27
c)
36
d)
81

None of the above

Step-by-step explanation:

We have to find irrational number in given options.

Rational number: That number which can not written as where p and q are integers,

Irrational number: The number which is not a rational number then, the number is called irrational number.

A.9

9 is an integer .Therefore, it belongs to rational number set not irrational number set.

So, it is false.

B.27

27 is an integer number.Therefore, it belongs to rational number set not irrational number set.

So, it is false.

C.36

36 is an integer number.Therefore, it belongs to rational number set not irrational number set.

So, it is false.

D.81

81 is an integer number.Therefore, it belongs to rational number set not irrational number set.

So, it is false.]

none of the above

i use my brain for prombles like this maybe you could try it

step-by-step explanation: