Number system of class 9 | Number System
NUMBER SYSTEM Even numbers:- The numbers which are the multiples of 2 or which come in the table of 2 are called even numbers eg. 2,4,6,etc Odd numbers:- The numbers which are not the multiples of 2 are called odd numbers eg. 1,3,5,7, etc. Prime numbers:- The numbers which have only two factors are called prime numbers eg. 2, 3 ,5 ,7, 11, 13 , 17 etc. All prime numbers from 1-100 There are total 25 prime numbers from 1 to 100. These are 2 , 3 ,5 ,7 , 11 , 13 ,17, 19 , 23, 29 , 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. Composite numbers :- The numbers which have more than two factors are called composite numbers eg. 4, 6. 8 ,9 etc. Note:- 1). 1 is neither prime nor composite. 2). 2 is only even prime number. Co-prime Numbers :- The two numbers which do not have any common factor other than 1 are called coprime numbers. or The two number...