**Sets of Numbers**

** **

**Natural numbers or counting numbers**

** **

** **{1, 2, 3, 4, 5, 6, . . . }

** **

**Whole numbers **{0, 1, 2, 3, 4, 5, 6, . . . }

**Integers **{. . . , 23, 22, 21, 0, 1, 2, 3, . . . }

**Rational numbers p and q are integers,**

*Examples: *, 1.3, or .

**Irrational numbers **{*x *| *x *is a real number that is not rational}

*Examples: *

* *

**Real numbers **{*x *| *x *is represented by a point on a

number line}*