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What is GCM and LCM?

I mostly need it for GCM or greatest common multiple. Websites are great. I just need help!!! Thank you for all.

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GCM is greatest common multiple. LCM is least common multiple. You get two numbers and right out all the multiples. Then you look at the lowest number that both factors have, thats the LCM. The same with the GCM, but instead of the lowest, it's the highest. :)

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Did you ever figure out that there us no such thing as the Greatest Common Multiple?
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GCM = Greatest Common Factor
It is the greatest number that will
divide into the numbers in question.
LCM = Least Common Multiple
It is the least number that the
numbers in question will divide into.
Examples:
1) 12 & 10. GCF = 2, LCM = 60
2) 4 & 20. GCF = 4, LCM = 20
3) 14 & 21. GCF = 7, LCM = 42
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P.S. There is no such thing as greatest common multiple or the
"so called GCM." You can always find a bigger multiple. The is GCF
or LCM.

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greatest common multiple? Ever hear that?
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There is the GCF, greatest common factor.This is the greatest number that will divide into the given numbers. It is used for reducing or symplifying fractions.
There is the LCM, least common multiple. It is the least number that the given numbers divide into. It's also
called the LCD, least common denominator. It is used when adding and subtracting fractions to give them the same denominators.
There is NO "greatest common multiple," because you can always find a greater one.
Example:
10 & 15, GCF=5, LCM=30
but there is no "GCM." Not only is 30 a common multiple but so is 60, 90,
120, 150 etc.
Please comment if you need more help in understanding this.
claire7752
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omg! Whatever.
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I have to go on Study Island, they teach me what GCM and LCM is. You don't sound like a teacher.
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Maybe you are thinking of GCF, greatest common factor, when you say GCM, greatest common multiple.
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Whatever. Say what you want.
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