180, 360, 540, 720, 900, 1080, 1260, 1440 . . .
1*180=180 2*180=360 3*180=540 4*180=720
The common multiples of 12 and 30 are 60, 180, 240, etc.
Multiples of 20 include 20, 40, 60, 80, 100, 120, and so on Multiples of 90 include 90, 180, 270, 360, 450, 540, 630, and so on. Common multiples of 20 and 90 include any multiple of 180.
35, 70, 115, 145, 180...
The common multiples of 9, 15, and 20 are an infinite set of multiples of their least common multiple, which is 180. so the common multiples of 9, 15, and 20 are 180, 360, 540, 720, 900, 1080, 1260, 1440, 1620, 1800, and so on.
They are 180 and any of its multiples
360,540,720,900,1080,1260,1440,1620,1800,1980,etc.
1*180=180 2*180=360 3*180=540 4*180=720
180, 360, 540, 720, 900
180
The multiples of 60 include 60, 120 and 180. For them to be common, they need to be compared to another set of multiples.
Any multiple of 180.
Any multiple of 180
Any multiple of 180
The only multiple of 36 and 45 is 180.
The first 5 multiples of 36 are: 36, 72, 108, 144, and 180.
The common multiples of 12 and 30 are 60, 180, 240, etc.