Real Numbers
A Real Number is any positive or negative number which includes integers, rational and irrational numbers. In simple terms, all the numbers except complex number(numbers which have negative roots/numbers in the form "a + ib") can be called as Real Numbers.
Integers
The set of all negative and positive numbers including zero but not decimal numbers(like 7.2, 85.5, 3/2.....) are called Integers.
Set of Natural Numbers={∞,.....3, 2, 1, 0, 1, 2, 3, ….., ∞}
Natural Numbers
The nonnegative integers except 0 is called Natural Numbers. It is also called 'Counting Numbers'.
Set of Natural Numbers={1, 2, 3, 4, 5, 6, …..∞}
Rational Numbers
A number in the form of p/q where p and q are integers and q≠0 that can also be expressed in terms of terminating or repeating decimals.
Examples: 4, 8, 4.27, 33.3333333,...etc.
Irrational Numbers
A number which can be expressed in the form of p/q where p and q are integers and q≠0 that are nonterminating and nonrepeating decimals.
Examples: π, e, √3, ∛13...etc.

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