Even Numbers

Any integer that can be divided exactly by 2 is an even number.

The last digit is 0, 2, 4, 6 or 8

Example: −24, 0, 6 and 38 are all even numbers

Odd Numbers

Any integer that cannot be divided exactly by 2 is an odd number.

The last digit is 1, 3, 5, 7 or 9

Example: −3, 1, 7 and 35 are all odd numbers

Odd numbers are in between the even numbers.

Adding and Subtracting

When we add (or subtract) odd or even numbers the results are always:

(red is odd, blue is even)

Even + Even=Even  2 + 4 = 6

Even + Odd=Odd   6 + 3 = 9

Odd + Even=Odd   5 + 12 = 17

Odd + Odd=Even   3 + 5 = 8

(The same thing happens when we subtract instead of adding.)

Multiplying

When we multiply odd or even numbers the results are always:

(red is odd, blue is even)

Even × Even= Even  4 × 8 = 32

Even × Odd= Even   4 × 7 = 28

Odd × Even= Even   5 × 8 = 40

Odd × Odd= Odd     5 × 7 = 35

Odd Fact

Every odd number has an "e" in it!