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.

Number line.jpg

It includes rational numbers & irrational numbers both.

 

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

Complex numbers.

  1. Chapter 1 Class 9 Number Systems
  2. Concept wise
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Transcript

There are different types of numbers Natural Numbers Whole Numbers Integers Rational Numbers Irrational Numbers Real numbers Complex 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, Complex numbers.

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.