In mathematics, a mean stands for the average. A mean is computed by adding all figures or numbers and then dividing them by their count. For example, you want to get the average number of apples that 3 kids have. One has 2, another has 3, and another has 1. Add 2,3, and 1. The sum is 6. Divide 6 by 3. The answer is 2 and that means the average number of apples that the kids have is 2.