The LCM is 12.
The GCF is 3.
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The LCM of 3, 6, and 12 is 12.The least common denominator is the same as the least common multiple.The least common denominator is the smallest multiple divisible by 3, 6, and 12. Since 12 is divisible by 3, 6, and 12, and the smallest multiple of 12 is 12 x 1 = 12, that is the least common denominator or least common multiple.
A common multiple is a number that appears on all the lists of multiples of a given set of numbers. 3, 6, 9, 12 4, 8, 12 12 is a common multiple of 3 and 4.
if you mean for 1/3 and 1/12, then to find common denominators, you just list multiples of the denominators 3 and 12. for 3 :3, 6, 9, 12... for 12:12, 24, 36... 12 is the smallest number in both lists, so it is the least common denominator.
The common factors of 6 and 12 are 1, 2, 3, and 6.
1, 2, 3, and 6 are the common factors of 6 and 12.