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Maths : All About Numbers : Natural, Whole, Even, Odd, Prime, Composite

Natural Numbers
1,2,3,4,........ are natural numbers.
The counting numbers are natural numbers.
1 is the smallest natural number.

 Whole Numbers
Natural numbers with 0 are called whole numbers.
0,1,2,3,4,......... are whole numbers. 0 is the smallest whole number.

 Even Numbers
A number divisible by 2 is called an even number.
2,4,6,8,20,48,66,84, are some even numbers.

 Odd Numbers
A number not divisible by 2 is called an odd number. 3,5,7,9,13,25,47,59 are some odd numbers.

 Prime Numbers
A number which is not divisible by any number except by itself or by 1 is called a prime number.
2,3,5,7,11,13 are some prime numbers.

 Composite Numbers
All numbers greater than 1 which are not prime numbers are called composite numbers.
4,6,8,9,10,12,49,81 are some composite numbers.

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