4 is.
4, 8 and 12 are the first 3 common multiples of 2 and 4
The first 2 common multiples of 4 and 12 are 12 and 24.
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.
2 4 6
Get the first common multiple, then multiply that by 0, 1, 2, 3, 4, etc. to get additional common multiples.
44,88
They are 4, 8 and 12
2, 4, 6
2, 4, 6
8 and 16
Since 4 is a multiple of 2, all the multiples of 4 will be common.
The first two common multiples of the pair of numbers 4 and 6 are: 12, 24.