**Numbers** is a mathematical structure which includes natural numbers, whole numbers, real numbers, rational numbers, irrational numbers, etc.
**Natural Numbers: **These are all numbers (1, 2, 3, 4, etc) that are used for counting, it is denoted by “N”
There are infinite natural numbers and smallest natural numbers is one(1).
**Even Numbers:** natural numbers which are divisible by 2 are .. |