First, factor each number and express this way:
12 = 22 x 3
22 = 2 x 11
30 = 2 x 3 x 5
Now, take the greatest power of each factor and find the product: 22 x 3 x 5 x 11= 660 is the LCM
Note: I selected only the 22 because it was the greatest power of 2 than any other factor of "2" in the other numbers. I selected one 3 beause it was the greatest power of 3, and one 5 and one 11 because they were unique factors. This method will effectively find the LCM of any set of numbers.
Factor each one. Then use each Prime number the most each one was used in any number.
12=2x2x3
22=2x11
30=2x3x5
LCM=2x2x3x5x11=660
LCM of 12 22 30 is 660.
LCM(12, 22, 30) = 660
The LCM of 22, 30 and 45 is 990.
The LCM is 132.
LCM(15, 22, 30) = 330
lcm(12, 30) = 60
The LCM of 12 and 30 is 60.
The LCM is 120.
The LCM is 60.
The LCM is 60.
The least common factor of any set of positive integers is 1.
The LCM of 12, 30 and 60 is 60.