A single number cannot have any common multiples - you need two or more numbers to compare.
Multiples of 2 include every even number. For them to be common, they need to be compared to another set of multiples.
The multiples of 2 are all the positive even numbers. For them to be common, they need to be compared to another set of multiples.
The first three multiples of 2 are 2, 4, 6. For them to be common, they need to be compared to another set of multiples.
1 and 2 are common factors. 84 and 168 are common multiples.
Since 4 is a multiple of 2, all the multiples of 4 will be common.
What are three common multiples of 2 6 8
the first two common multiples of 15,27 are 135,270
The first 2 common multiples of 4 and 12 are 12 and 24.
The most common multiples are 13 3 3234 2 2 2 2 232
30 and all its multiples
78 and any of its multiples
They are all multiples of 6