# Different Types of Numbers

### My math teacher was hungry but all she had was a piece of pi

## Numbers to solve problems?

We use numbers to solve problems. A simple problem such as "If Ellen has 3 walls on which to watch the paint dry, and she watches 1 of them, how many walls are left to watch?" has a simple answer. As problems get more interesting, as surely they must, so do the numbers we need in order to solve them.

## Here are some examples of Numbers

## Natural Numbers The counting numbers {1, 2, 3, ...}, are called natural numbers. They include all the counting numbers i.e. from 1 to infinity. | ## Whole Numbers They are the natural numbers including zero. Not all whole numbers are natural numbers, but all natural numbers are whole numbers. | ## Integers Positive and negative counting numbers, as well as zero. |

## Natural Numbers

The counting numbers {1, 2, 3, ...}, are called natural numbers. They include all the counting numbers i.e. from 1 to infinity.

## Whole Numbers

They are the natural numbers including zero. Not all whole numbers are natural numbers, but all natural numbers are whole numbers.