Any number that can be denoted in the form 6n where n is an integer is a multiple of 6. So if two values p and q are there, we say that q is a multiple of p if q = np for some integer n.
Some of the multiples of  include
| 6 | 18 | 21 | 600 | 60 |
All numbers which can be divided or is a product of 6 is a multiple of 6. The multiples are also called factors and it depends on their use in the equation too.
For example, 9, 21, 12 and 66 are all multiples of 6 for the following reasons
| 36 | = | 6 | x | 6 |
| 30 | = | 6 | x | 5 |
| 24 | = | 6 | x | 4 |
| 48 | = | 6 | x | 8 |
These values are called as multiples as these values are obtained by adding or subtracting original value many times.
The multiples of 6
| Multiplication: | Multiples of 6: |
| 6 x 1 | 6 |
| 6 x 2 | 12 |
| 6 x 3 | 18 |
| 6 x 4 | 24 |
| 6 x 5 | 30 |
| 6 x 6 | 36 |
| 6 x 7 | 42 |
| 6 x 8 | 48 |
| 6 x 9 | 54 |
| 6 x 10 | 60 |
| 6 x 11 | 66 |
| 6 x 12 | 72 |
| 6 x 13 | 78 |
| 6 x 14 | 84 |
| 6 x 15 | 90 |
| 6 x 16 | 96 |
| 6 x 17 | 102 |
| 6 x 18 | 108 |
| 6 x 19 | 114 |
| 6 x 20 | 120 |
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