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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.

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15y ago

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