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There is really no such thing as a "greatest common multiple". Once you find the least common multiple of a set of numbers, you can keep adding the LCM to itself over and over again. Each new number you get will be a common multiple of your set of numbers, but each new number will always be larger than the previous. This means that you can keep adding while the number approaches infinity and you will still never find a greatest multiple.
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CoachThere is really no such thing as a "highest common multiple". Once you find the least common multiple of a set of numbers, you can keep adding the LCM to itself over and over again. Each new number you get will be a common multiple of your set of numbers, but each new number will always be larger than the previous. This means that you can keep adding while the number approaches infinity and you will still never find a greatest multiple.
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Least common multiple of 13 and 15?
Least common multiple of 13 and 15 is 195.
What is the greatest common multiple of 15 and 20?
The greatest common multiple of any set of integers is infinite.
What is the greatest common multiple of 15 21?
The greatest common multiple of any set of integers is infinite.
What is the greatest common multiple of 3 and 9 and 15?
The greatest common multiple of any set of integers is infinite.
What is the greatest common multiple of 3 and 5?
There is no greatest common multiples for whatever common multiple is claimed to be the greatest the lowest common multiple of the numbers (in this case 15) can be added to get an even greater common multiple.
