A factor is a positive integer that divides evenly into a given number. The factors of 8 are 1, 2, 4, and 8. A multiple is a number that is the product of that number and an integer. The multiples of 8 are 0, 8, 16, 24, ...
Which of these numbers is a factor of 20?
| 20 | |
| 21 | |
| 22 | |
| 19 |