They are: 180, 360 and 540
The first three common multiples are 18, 36, and 54.
The first three multiples of 3 are 3, 6, 9 The first three multiples of 9 are 9, 18, 27 As the lowest common multiples of 3 and 9 is 9, the common multiples of 3 and 9 are the multiples of 9, thus: The first three common multiples of 3 and 9 are 9, 18, 27
The first three multiples of 9 are 9, 18 and 27. For them to be common, they need to be compared to another set of factors.
First three common multiples of 2 and 6 are 6, 12 and 18.
18, 36, 54
1, 660, 5580
18, 36, 54.
6, 12 and 18
6, 12, 18
9, 18, 27
54, 108, and 162.
10998, 21996, 32994.