Odd and Even Number

A number is even when pairs can be made. A number is odd when pairs cannot be made.

A number is odd when pairs cannot be made, one is always left over.

Video: Odd and Even Numbers

Note: Observe the following operation. Do you get a odd or even number?

2 + 6= 8

3 + 7= 10

3 + 6 = 9

5 + 7 = 12