Common multiples of 6 and 10 are 30, 60, 90, 120, 180, 210...
30, 60, 90, 120, 150, 180, 210, 240, 270 +30 . . .
210 is not a multiple of 420. 420 is a multiple of 210.
Multiples of 120 include 120, 240, 360 and so on. For them to be common, they need to be compared to another set of multiples.
Example: 30 and 42List the multiples.30, 60, 90, 120, 150, 180, 210, 24042, 84, 126, 168, 210, 252The LCM is 210.
Common multiples include any multiple of 210.
The Least Common Multiple (LCM) for 210 330 is 2310.
Common multiples of 14 and 35 include 70, 140 and 210
The LCM is 120.
The GCF is 30.
It is 210.
210, 420