Which number is irrational?
a) 1 3/5
b) √0.65
c) √144
d) 11/22

The answer is: B)

An irrational number is a number which cannot be expressed like a fraction of entire numbers because there is not possible that any fraction can exactly express that number.

Let's discard each option in order to find the irrational number:

A)

So, A, is a rational number.

B)

There is not a fraction of entire numbers that can be written to express that number since it have infinite decimals.

C)

It's an exact number, so it's a rational number.

D)

It's a rational number since it can be written as a fraction of entire numbers.

Have a nice day!

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step-by-step explanation: