Learn All Concepts of Chapter 1 Class 9 - FREE. Check - Chapter 1 Class 9 Maths

There are different types of numbers

- Natural Numbers
- Whole Numbers
- Integers
- Rational Numbers
- Irrational Numbers
- Real numbers
- Complex numbers

We can also classify numbers as

- Odd or even
- Prime or composite
- Decimals, or fractions

Let's look at some different type of numbers

## Natural numbers

Numbers which start from 1.

Eg:- 1, 2, 3, 4,………..

## Whole numbers

Numbers which start from 0.

Eg:- 0,1, 2, 3, 4,………..

## Integers

Positive and negative numbers are called integers

Eg:- ……… -4, -3, -2, -1, 0, 1, 2, 3, 4,………..

## Rational Numbers

Numbers which can be written in p/q form, where q ≠ 0

Eg:- 2/3, 4/5

## Irrational Numbers

Numbers which cannot be expressed in p/q form.

Eg:- √2, √3, π

## Real Numbers

All Numbers on number line are real numbers.

It includes rational numbers & irrational numbers both.

There are some numbers which we will study in Class 11,