Any multiple of 36.
The LCM of 4, 9, and 12 is 36
The LCM of 9 and 12 is 36
The common multiples of 9 and 12 are 36, 72, 108, 144, 180, 216, 252, 288, 324, 360, and so on. They are the infinite set of multiples of the LCM of 9 and 12, which is 36.
36
36
36
Multiples of 3 include 3, 6, 9, 12, 15 and so on. For them to be common, they need to be compared to another set of multiples.
Multiples of 3 include 3, 6, 9, 12, 15, and so on. To be common, they need to be compared to another set of multiples.
36, 72 and 108
They are 36 and 72
Any multiple of 252
36, 72, 108 and so on.