list the coomon multiples of 2 and 3 up to 28
Common mutiples of 2 and 3 up to 28
2 4 6 8 10 12 14 16 18 20 22 24 26 28
3 6 9 12 15 18 21 24 27
Now....just choose the numbers common to both lists =
6 12 18 24
And those are the common multiples
