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What is the greatest common factor of $16$ , $20$ , and $8$ ? $\newline$ ____

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Greatest common factor of three or four numbers

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Q. What is the greatest common factor of

16

,

20

, and

8

?

\newline

____

List Factors of $16$ : List the factors of $16$ . $\newline$ $1 \times 16 = 16$ $\newline$ $2 \times 8 = 16$ $\newline$ $4 \times 4 = 16$ $\newline$ Factors of $16$ : $1$ , $2$ , $4$ , $8$ , $16$
List Factors of $20$ : List the factors of $20$ . $\newline$ $1 \times 20 = 20$ $\newline$ $2 \times 10 = 20$ $\newline$ $4 \times 5 = 20$ $\newline$ Factors of $20$ : $1$ , $2$ , $4$ , $5$ , $10$ , $20$
List Factors of $8$ : List the factors of $8$ . $\newline$ $1 \times 8 = 8$ $\newline$ $2 \times 4 = 8$ $\newline$ Factors of $8$ : $1$ , $2$ , $4$ , $8$
Identify Common Factors: Identify the common factors of $16$ , $20$ , and $8$ .
Factors of $16$ : $1$ , $2$ , $4$ , $8$ , $16$
Factors of $20$ : $1$ , $2$ , $4$ , $20$ $3$ , $20$ $4$ , $20$
Factors of $8$ : $1$ , $2$ , $4$ , $8$
Common factors: $1$ , $2$ , $4$
Find Greatest Common Factor: Find the greatest common factor (GCF). The common factors are $1$ , $2$ , and $4$ . The greatest of these is $4$ . GCF of $16$ , $20$ , and $8$ : $4$

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