# NCERT Class 9 Solutions: Number Systems (Chapter 1) Exercise 1.5 – Part 1

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Q-1 Classify the following numbers as rational or irrational:

Solution:

• Given multiple numbers and classify the numbers as rational or irrational

1. Since it is non-terminating and non-recurring number

So, it is an irrational number

2. Since the number can be written form

So, it is a rational number

3. Since the number can be written form

So, it is a rational number

4. Since it is non-terminating and non-recurring number

So, it is an irrational number

5. Since it is non-terminating and non-recurring number

So, it is an irrational number

Q-2 Simplify each of the following expressions:

Solution:

1. =

2. Using identify

3. Using identify

4. Using identify