0(1.) Natural Number: Counting number is known as a natural number.
E.g. 1,2,3,4.......
(2.) Whole Number: When we add 0(zero) in the collection of the natural number, we get the Whole Number.
Eg. 0,1,2,3,4...
(3.) Even Number: Those numbers which are divisible by 2 are known as Even Numbers.
Eg. 0,2,4,6,8,10,12.....
(4.) Odd Number: Those numbers which are not even are known as Odd Number, i.e. odd numbers are not divisible by 2.
Eg. 1,3,5,7,9,11.....
(5.) Prime Number: These numbers are divisible by 1 and itself.
Eg. 2,3,5,7,11,13,17...
A smallest prime number is 2, which is also an even number.
