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42 votes
42 votes
Find the LCM of 9 and 6.

User Markus Heberling
by
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1 Answer

19 votes
19 votes

ANSWER


18

Step-by-step explanation

We want to find the LCM of 9 and 6.

First, we have to write the numbers as products of their prime factors.

We have:


\begin{gathered} 6\Rightarrow2\cdot3 \\ 9\Rightarrow3\cdot3 \end{gathered}

Now, write the product of all the prime factors of both numbers without repeating the common numbers. That is:


2\cdot3\cdot3

Notice that only two 3s are written since one set of 3s appears in both 6 and 9.

Hence, the LCM of 6 and 9 is:


\begin{gathered} 2\cdot3\cdot3 \\ \Rightarrow18 \end{gathered}

User Isakbob
by
3.1k points
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