The first three common multiples of 6 and 8 are 24, 48, and ______.

The first three common multiples of 6 and 8 are 24, 48, and 72.
We have been given the two common multiples of 6 and 8 i.e., 24, and 48.
The multiple is a number that can be evenly divided by another number.
We know the multiples of 6 are 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 72, and so on.
The multiples of 8 are 8, 16, 24, 32, 40, 48, 56, 64, 72 and so on.
The next common multiple after 48 is 72. 

Therefore, the first three common multiples of 6 and 8 are 24, 48, and 72.