Answer: (1), (2) , (3) are irrational numbers.
Explanation:
(1)
A number is called an irrational number if it can not be written as a simple fraction form. For example .
If a real number is multiplied by an irrational number then the result is an irrational number.
Since the result of these square roots are a rational number, therefore these are rational numbers and are irrational numbers.
(2)
All the number in the option can not be written in the form of simple fraction, so all the options represents the irrational numbers.
(3)
Therefore, the number is an irrational number. The numbers are rational numbers.