Multiples of 15: 15, 30, 45, 60, 75, 90, …
Multiples of 20: 20, 40, 60, …
LCM(15, 20) = 60
Multiples of 20: 20, 40, 60, …
LCM(15, 20) = 60
The solution above and all other related solutions were provided by the Least Common Multiple by Listing Multiples Application.