| Term | Definition |
| Factor | Two numbers that are multiplied to get a product. |
| Product | An answer to a multiplication problem. |
| Divisor | A number by which dividend is divided. It is same as factor. |
| Sum | An answer to an addition problem. |
| Even Number | A number ends with 2, 4, 6, 8 and 0 OR A number that is multiple of 2. |
| Odd Numbers | A number ends with 1, 3, 5, 7 and 9. A number that is not a multiple of 2. |
| Prime number | A number with only 2 factors, 1 and itself. |
| Even Prime number | 2 |
| Composite Number | A number with more than two factors. |
| Proper Factors | All the factors of a number, except the number itself. |