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What is the least common multiple of $3$ and $9$ ? $\newline$ _____

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Least common multiple

Full solution

Q. What is the least common multiple of

3

and

9

?

\newline

_____

List Multiples of $3$ : Step $1$ : List the multiples of $3$ . $\newline$ Start with $3$ and keep adding $3$ to get the next multiple. $\newline$ Multiples of $3$ : $3, 6, 9, 12, 15, 18, 21, 24, 27, 30\ldots$
List Multiples of $9$ : Step $2$ : List the multiples of $9$ . $\newline$ Start with $9$ and keep adding $9$ to get the next multiple. $\newline$ Multiples of $9$ : $9, 18, 27, 36, 45, 54\ldots$
Find Common Multiples: Step $3$ : Find the common multiples from both lists. $\newline$ Common multiples of $3$ and $9$ : $9$ , $18$ , $27$ ... $\newline$ The smallest common multiple is the LCM.

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