# What Are Even and Odd Numbers?

The integers are divided into two groups: Even numbers and odd numbers. In the figure below you see some numbers in blue and some numbers in grey. The grey are odd numbers and the blue are even numbers.

As you can see from the figure, every other integer is even or odd.

There are 4 chocolates on a table. You and a friend share these. Do you get equally many chocolates? Is 4 an even or odd number?

When you divide $4$ chocolates between two people, you get $2$ each. Because you get the same amount of pieces and there are non left over, so $4$ is an even number. Take a look at the numbers above. Are these the grey or the blue numbers?

When you’re dividing $7$ pieces between two people, you get $3$ each, but there’s one piece left over. In reality you can take a knife and divide the last piece, such that you get one half each. But you cannot divide the $7$ pieces in such a way that you get the same amount of whole pieces. Therefore, you know that $7$ is an odd number. This is because odd numbers cannot be divided by two. From the numbers above, you see that $7$ is blue, so the odd numbers are blue.