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Math Help - greatest and least common factor

  1. #1
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    greatest and least common factor

    I need to know how to find the greatest factor of 24,18,15 and..
    the least common factor for 8 and 20. Please help.
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  2. #2
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    Please edit your post. I don't think you have what you intend.
    Do you mean greatest common factor and least common multiple?
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  3. #3
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    Yes it is greatest common factor, and least common multiple.
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  4. #4
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    24=2^3\cdot 3~,~18=2\cdot 3^2~\&~15=3\cdot 5

    What is common? What is the least multiple?
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