Number System Formula and Definition, Best Trick Easy Method

Number System
Number System

The number system is the main basis of mathematics because the number system is the main source of calculation. You cannot get to have a complete knowledge of mathematics without the knowledge of the number system, that is, for a good knowledge of mathematics, it is mandatory that you have knowledge of the number system.

Questions related to the number system are asked in competitive and academic tests. Using the number system works both for solving formula problems and for simplifying questions.

Complete knowledge of number system will create interest in studying mathematics and you will also have attachment to mathematics so that you will never be afraid of mathematics in competition.

In this article, we are discussing about the number system, moving on some information, we will read numbers and number system and formulas and definitions in particular.

Definition and Types of Number System

Number Systems Definition in Hindi has defined all the necessary numbers with examples that will help you understand the number system.


Number is that arithmetic value, which we can express in the form of words, symbols, numbers and figures and we can use it in the process as calculation, measurement, it is called number.

Different types of numbers

  • Natural number
  • whole numbers
  • integer
  • even number
  • odd number
  • Composite number
  • prime number
  • rational number
  • Irrational number
  • tracking number successive numbers
  • preceding number. predictive numbers

Natural numbers

All numbers used in calculations are natural numbers. These entities do not include 0.

Example – 1, 2,3,4,5,6,7……

natural numbers

whole numbers

If zero (0) is included in the group of natural numbers, that group of numbers is called an integer.

Example – 0,1,2,3,4,5,6,7……

whole numbers


In the group of natural numbers, the group formed after the inclusion of both positive and constructive natural numbers are called integers.

Example- -3,-2,-1,0,2,3……


Even number

Even numbers are those that are completely divisible by two (2), they are called even numbers. Example- 2,4,8,10,22,100…..

Even number

Odd numbers

odd numbers | Odd numbers are those that are not exactly divisible by two, they are called odd numbers.

Example- 3,5,7,9,11…

Odd numbers

Composite numbers

A number that is exactly divisible by a number other than itself is a composite number.

Example – 4,6,8,9,10,12,14,15…

Composite numbers

prime numbers

A number that is not exactly divisible by any digit other than itself and 1 is called a prime number.

Example- 2,3,5,7,11,13….

Prime numbers

Rational numbers

A rational number is a number that can be expressed in the form p/q. It is called a rational number where p and q are not integers.

Example: 3/4, 5/6, 4/9…..

Rational numbers

Irrational number

Irrational numbers are those that cannot be expressed in the form of p/q. They are called irrational numbers.

Irrational numbers

successive number

The number immediately next to a natural number is the subsequent number of that number, that is, if one is added to any number, its subsequent number is obtained.

Example -11 is followed by 12. And the number that follows 12 is 13.

successive numbers

Predictive numbers

The first number of any natural number is called the predecessor number of that number, that is, if 1 is subtracted from a number, then the number before that number is known.

Example: The predecessor number of 20 is 19. And the predecessor of 50 is 49.

predictive numbers

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