### Instruction: Give me an example of numbers in these categories:  Natural Numbers, Prime Number, Composite Number, Whole Numbers, Integers, Rational Numbers, Irrational Numbers, Real Numbers, Complex Number.
### Response: These are a few examples for each type of number:

Natural Numbers: 1, 2, 3, 4
Prime Number: 2, 3, 5, 7
Composite Number: 4, 6, 8, 9
Whole Numbers: 0, 1, 2, 3
Integers: -1, 0, 1, 2
Rational Numbers: −1/3, 0.99999…, 7/2, 13/9
Irrational Numbers: √5, √11, √21, π
Real Numbers: -2, 0, 1/2, √3
Complex Number: 0.39 + 1.9 i, √5 + √9i, −5 + πi, 2 + i