The greatest common multiple of any two or more numbers cannot be determined because the common multiples of any two or more numbers are infinite.
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There is no "greatest common multiple" for any pair of numbers. If you meant greatest common factor, the answer is 3.
3
The least common multiple is 30. The greatest common factor is 3.
LCM(3, 19, 20) = 1140.
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 or a LOWEST common multiple:gcf(27, 6) = 3lcm(27, 6) = 54Using the factorisation method:27 = 3³6 = 2 x 3hcf = 3lcm = 2 x 3³ = 54