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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The Greatest Common Factor of 15, 45: 15The Least Common Multiple of 15, 45: 45
The LCM of 36 and 45 is 180.To find the LCM, list the multiples of each number. The first one that both numbers have in common is the LCM.Multiples of 36 are 36, 72, 108, 144, 180, 216Multiples of 45 are 45, 90, 135, 180, 225The first multiple they have in common is 180, so it is the LCM.Least Common Multiple (LCM) for 36 45 is 180
The least common factor of two numbers is always one The greatest common factor of 36 and 45 is 9
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The Greatest Common Factor of 18, 36, and 45 is 9