There's many odd and even numbers. Odd would go 1, 3, 5, 7, 9. Even would go 2, 4, 6, 8, 10. To figure out if its an even number, you would do 2+2=4. 4=2=6. 6=2=8. You'll do this method because 2 is an even number and it can go into any other even number. Not quite sure if I explained this correctly, if I didn't you can shoot me a msg.