Any multiple of 21.
14, 28, 42
write the first three common. multiples of 3,4,5
What are three common multiples of 2 6 8
Multiples of seven include 7, 14, 21, 28, 35, 42, 49 and so on. For them to be common, they need to be compared to another set of multiples.
A single number cannot have common multiples.
The first three multiples of 99.
The first three multiples of 4 are 4, 8 and 12. 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.
The first three common multiples of 8 and 12 are 24, 48, and 72.
The first three multiples of 3 are 3, 6, 9 The first three multiples of 9 are 9, 18, 27 As the lowest common multiples of 3 and 9 is 9, the common multiples of 3 and 9 are the multiples of 9, thus: The first three common multiples of 3 and 9 are 9, 18, 27
If that's 9, 14 and 21, the first three common multiples are 126, 252 and 378.
15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.