30
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Least common multiple of 5 6 and 21 is 210.
The least common multiple of 4 , 10 , 5 , 6 = 60
Least Common Multiple (LCM) for 5 4 6 is 60
THe Least Common Multiple (LCM) for 6 5 7 is 210.
There is no greatest common multiple: for whatever value you say is the greatest I can always add their lowest common multiple and get an even greater common multiple.There is a greatest common FACTOR and a LOWEST common multiple:gcf(5, 6) = 1lcm(5, 6) = 30