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The greatest common factor, or GCF, is the largest positive integer that will divide evenly with no remainder into all the members of a given set of numbers. The least common multiple, or LCM, is the smallest positive integer that all the members of a given set of numbers will divide into evenly with no remainder.

18 is the GCF of 36 and 54.

18 is the LCM of 6 and 9.

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11y ago
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12y ago

You need at least two numbers to find an LCM.

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11y ago

It's easier to do it the other way. The GCF of consecutive even integers is 2. The product of 18 and 20 is 360. 360 divided by 2 is 180, the LCM.

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9y ago

2 x 3 x 3 = 18

2 x 2 x 5 = 20

The GCF is 2

2 x 2 x 3 x 3 x 5 = 180, the LCM

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9y ago

They are: 2 and 144 respectively

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Q: What is LCM of 18?
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