Even and Odd Numbers

Even Numbers

Any integer that can be divided exactly by 2.
The last digit will be 0, 2, 4, 6 or 8

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

If it is not an even number, it is called an odd number.
The last digit will be 1, 3, 5, 7 or 9

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

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

Operation	Result	Example (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 if you subtract instead of adding)

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

Operation	Result	Example (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