You look at the larger number (60) and examine its multiples until you find one that is also a multiple of the smaller number.
In this particular case, we only need examine one multiple of 60.
60 is the lowest common multiple.
(60 * 1 = 60)
(15 * 4 = 60)
LCM of 15 and 60 = 60
The LCM is 60.
LCM(15, 20, 30) = 60
The LCM of 15 30 and 60 is 60.
The LCM is 60.
The LCM is 60.
The LCM is 420.
The LCM is 300.
The LCM is 240.
You need at least two numbers to find an LCM. If that's 4 and 15, the LCM is 60.
Two or more numbers are normally needed to find the LCM
The LCM is: 60