Any multiple of 36.
There is no such thing as a "greatest common multiple".
The common multiples of 18 and 24 are 72 and 144.
All multiples of 36 are multiples of 18.
36, 72, and 108.
there are infinite amount of common multiples.
18, 36, 54, 72
The lowest common multiple is 18. The first four common multiples are thus the first four multiples of 18 and are: 18, 36, 54 and 72.
No, 4 is neither a multiple of 12 and 18, nor is it a factor of 12 and 18. The least common multiple of 12 and 18 is 72. Their other common multiples are 144, 216, 288, etc.
The set of multiples of 18.
Multiples of 6 include 6, 12 and 18. For them to be common, they need to be compared to another set of multiples.
They are 180 and any of its multiples
To find a number that is not a common multiple of 4 and 9, we need to consider the multiples of each number. The multiples of 4 are 4, 8, 12, 16, 20, 24, ... and the multiples of 9 are 9, 18, 27, 36, 45, ... The first number in the list of multiples of 4 that is not a multiple of 9 is 4. Therefore, 4 is a number that is not a common multiple of 4 and 9.