**About this chapter:**

### What is Rational Numbers?

The number of the form m/n are called rational numbers. Here m and n are integers but n is not zero.

### What is Irrational Numbers?

There are many more numbers on a number line which are not rational numbers they are called irrational numbers.

√2 is such an irrational number

**Practice Set 1.1**

Q.1. Show the following numbers on a number line. Draw a separate number line for each.

Solution:

Solution:

Solution:

Solution:

Q.2.Observe the number line and answer the questions.

1)Which number is indicated by point B?

2)Which point indicates the number
1
3
4
?

Ans:

Point C is marked on the 7th equal part on the right side of O. ∴ The number 1 3 4 is indicated by point C.
3)State whether the statement ,’the point D denotes the number
5
2
is true or false.

Ans: Point D is marked on the 10th equal part on the right side of O.
∴ D denotes the number
5 x 2
2 x 2
=
5
2

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