60, 120, 180, 240
20 pinkgal333:20, 40, 60 are all common multiples.
60 and all its multiples
Common multiples include any multiple of 60.
The multiples of 20 are 20, 40, 60, 80, 100, 120... The multiples of 30 are 30, 60, 90, 120, 150... The multiples of 15 are 15, 30, 45, 60, 75, 90, 105, 120, 135... The common multiples of 20, 30, and 15 are 60, 120, 180, 240...
LCD= 60
60 is the lcm
20, 40, 60 and so on. 30, 60, 90 and so on. Common multiples include 60, 120, 180 and so on.
60 and the infinitely many multiples of 60.
The LCM of 20 and 30 is 60. The multiples of 20 are 20, 40, 60, and so on. The multiples of 30 are 30, 60, and so on. So teh LCM of 20 and 30 is 60.
15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.
60
The LCM is 60