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Method: Multiply them together.
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The least common factor of any set of integers is 1.
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It is a method of finding the LCM (Least Common Multiple) of 2 or more numbers. Suitably used for finding the least common denominator when adding/subtracting fractions.
Lead Weight
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fractional distillation
The LCM is 12.
It is: 30
It doesn't matter what method you use, you still need at least two numbers to find something in common.
The Least Common Multiple (LCM) of (12,18,20) is 180.