Answer:
Rational
Integer
Whole
Real
Explanation:
Rational:
The square root of 4 is 2, which is an integer (number without decimals). A number is only irrational if it has endless decimals after it.
Integer:
A number without decimals
Whole:
A number without fractions; an integer.
Real:
Real numbers include whole numbers, rational numbers and irrational numbers- pretty much any number you can think of. The only numbers that ARENT considered real are imaginary numbers like √-1 and infinity.