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What is the greatest common factor of $18$ , $6$ , and $9$ ? $\newline$ _____

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Greatest common factor of three or four numbers

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Q. What is the greatest common factor of

18

,

6

, and

9

?

\newline

_____

List Factors of $18$ : List the factors of $18$ . $\newline$ $1 \times 18 = 18$ $\newline$ $2 \times 9 = 18$ $\newline$ $3 \times 6 = 18$ $\newline$ Factors of $18$ : $1$ , $2$ , $3$ , $6$ , $9$ , $18$
List Factors of $6$ : List the factors of $6$ . $\newline$ $1 \times 6 = 6$ $\newline$ $2 \times 3 = 6$ $\newline$ Factors of $6$ : $1$ , $2$ , $3$ , $6$
List Factors of $9$ : List the factors of $9$ . $\newline$ $1 \times 9 = 9$ $\newline$ $3 \times 3 = 9$ $\newline$ Factors of $9$ : $1$ , $3$ , $9$
Identify Common Factors: Identify the common factors of $18$ , $6$ , and $9$ . $\newline$ Factors of $18$ : $1$ , $2$ , $3$ , $6$ , $9$ , $18$ $\newline$ Factors of $6$ : $1$ , $2$ , $3$ , $6$ $\newline$ Factors of $9$ : $1$ , $3$ , $9$ $\newline$ Common factors: $1$ , $3$
Find Greatest Common Factor: Find the greatest common factor (GCF). The common factors are $1$ and $3$ ; $3$ is greater than $1$ . GCF of $18$ , $6$ , and $9$ : $3$

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