2016 AMC 8 Problems/Problem 20

Revision as of 10:10, 23 November 2016 by Reaganchoi (talk | contribs) (Solution)

The least common multiple of $a$ and $b$ is $12$, and the least common multiple of $b$ and $c$ is $15$. What is the least possible value of the least common multiple of $a$ and $c$?

$\textbf{(A) }20\qquad\textbf{(B) }30\qquad\textbf{(C) }60\qquad\textbf{(D) }120\qquad \textbf{(E) }180$

Solution

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2016 AMC 8 (ProblemsAnswer KeyResources)
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Problem 1
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Problem 3
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