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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Please edit your post. I don't think you have what you intend. Do you mean greatest common factor and least common multiple?
Yes it is greatest common factor, and least common multiple.
$\displaystyle 24=2^3\cdot 3~,~18=2\cdot 3^2~\&~15=3\cdot 5$ What is common? What is the least multiple?
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