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Number System

Numbers

Number system is the most important tools in the world used to count,labeling,sequencing and coding and measuring purpose.


Types of Number system





  • Natural Number :- Numbers that can be counted are called Natural numbers like 1,2,3,4,5,6................                                                            
                                 
  • Whole Number :- Numbers that can be counted together with zero are called whole number. Example:-0,1,2,3,4,5..............             
                                                                                      
  • Even Number :-Even Numbers are the Numbers which are divided by 2 are called even number.Example 2,4,6,8,10,12................       
                                                                                                   
  • Odd Number :- Odd Numbers are the Numbers which are not divided by 2 are called Odd numbers. Example:-1,3,5,7,9,11.......                                                                                                                                                                                                                                                                         
  • Prime number :- Numbers which are divisible by itself or 1 are called prime numbers.      Example :- 1,3,5,7,11,13...........                                                                                                                                                                                                                                                                              
  • Composite number :-Number which are greater than 1 and not prime are called Composite numbers.Example :- (4,6,8,9,10,12,14,15..........    )                                                                                                                                                                                                                               
  • Co-prime number:- when the H.C.F of two natural number is 1 is called co-prime number    Example:-(2,3) (4,5) (7,9)..............                                                                                                                                                                                                                                                             
  • Rational Number :- The number which are in the form of p/q (p and q are integers) and q cannot be zero.Example (2/3), (4/5),...................                                                                                                                                                                                                                                                
  • Irrational number :- The number which are not rational numbers and non- repeating form.    Example :- √3, √4.................................                                                                                                                                                                                                                                                                                                                                                         
  • Real Number :- Every natural,whole,integer,rational and every irrational number is a real number.




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