It is: 240
The LCM is 240.
1200 1200/80 = 15 1200/60 = 20
LCM(15, 20, 30) = 60
The LCM of 12, 30 and 60 is 60.
The LCM of 15 30 and 60 is 60.
The LCM of 20 and 30 is 60...
The LCM is 60.
The LCM is 60.
The LCM of 30 and 60 is 60
The LCM is 60.
The LCM is: 1680
Write out the multiples of each: 30, 60, 90, 120 40, 80, 120. 120 is the first that appears in both and this is your LCM