To work this out, you first have to give the numbers as their prime factors:
6 = 2x3
34 = 2x17
The next step is to identify the HCF. In this case, the HCF is 2. Finally, you multiply the numbers together and divide by the HCF:
6x34/2 = 102
The LCM is: 30
6
18
The LCM of 3, 6, 11 is 66.
The LCM is 24.
The LCM is 12.
The LCM is: 34
The LCM is: 34
The LCM is 850.
The LCM is 1700.
The LCM is 544.
The LCM of 6 15 and 20 is 30.