42, 63, 84 and so on.
Multiples of 3 are 3, 6, 9 and so on. Multiples of 7 are 7, 14, 21 and so on. The common multiples of 3 and 7 include 21, 42, 63 and so on.
The LCM of 3 and 7 is 21
The first 3 multiples of 7 are: 7, 14, and 21.
Odd multiples of 21.
The LCM is: 21
The common multiples of 3 and 7 are 21, 42, 63 and so on.
7, 14 and 21.
Factors: 1, 3, 7, 21 Multiples: 21, 42, 63, 84 and so on.
21
3,6,9,12,15,18
Anything that isn't 7, 14, 21, 28, 35 and so on.
Multiples? There are an infinite amount. Factors on the other hand, there are: 1, 3, 7 and 21.