It is: 42
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Least common multiple of 5 6 and 21 is 210.
The Least Common Multiple (LCM) for 2 6 18 21 is 126.
LCM(21, 6, 18) = 126
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions.
The Least Common Multiple (LCM) for 6 7 12 is 84.