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Number System and Conversion

A number system is a method to represent numbers. There are 4 types of  number systems. They are:

1. Decimal Number System 

This number system is used in our day to day lives. 

The Decimal Number system contains digits from 0 to 9 . So the base of the decimal number system is 10.


  • (1234) 10
  • (89.10) 10  

2. Binary Number System

The Binary Number system contains two digits 0 and 1 . So the base of the binary number system is 2.


  • (1010) 2
  • (111.101) 2

3. Octal Number System 

The Octal Number system can contain digits from 0 to 7 . So the base of the octal number system is 8.


  • (561) 8
  • (12.167) 8  

4. Hexadecimal Number System

The Hexadecimal Number system can contain digits from 0 to 9 and alphabets from A to F . So the base of the hexadecimal number system is 16.


  • (A89) 16
  • (CD.117) 16

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.