The LCM is 630.
630
The LCM is 2520.
2520
The LCM of 21 and 18 is 126.
LCM(21, 42, 18) = 126
12 and 9. Since both have to be multiples of 3 and sum to 21, the only pairs to consider are 3 and 18 6 and 15 9 and 12 Of these, 3 and 18 have an LCM of 18 and 6 and 15 have an LCM of 30.
The LCM is 3360.
The LCM is 210.
LCM of 15 9 and 18 is 90. The LCM of 9, 15 and 18 is 90.
The LCM is 2520.
The LCM is 90.
The least common multiple (LCM) of 18, 21, and 56 is 504.