18, 36, 54, 72, 90, 108, 126, 144 +18 . . .
The lowest common multiple is 18
18 and 36
18
The least common multiples of the number 6 and 9 is 3.
18.
The common multiples of 6 and 9 are the infinite set of multiples of their LCM, which is 18. So the common multiples of 6 and 9 are 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, and so on.
Not all of them are. Consider 27. 6 and 9 share a lot of common multiples because they share a common factor.
The common multiple of 9 and 6 is 18 because 9*2 is 18 and 6*3 is 18
The LCM is: 18
Multiples of 90
Multiples of 2 are 2, 4, 6, 8, 10, 12, 14, 16, 18…Multiples of 3 are 3, 6, 9, 12, 15, 18… Common multiples of 2 and 3 are 6, 12, 18… The LCM is 6.
18
3