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What is the greatest common factor of $20$ , $14$ , and $10$ ? $\newline$ _____

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Greatest common factor of three or four numbers

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Q. What is the greatest common factor of

20

,

14

, and

10

?

\newline

_____

List Factors of $20$ : Step $1$ : 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 $14$ : Step $2$ : List the factors of $14$ . $\newline$ $1 \times 14 = 14$ $\newline$ $2 \times 7 = 14$ $\newline$ Factors of $14$ : $1$ , $2$ , $7$ , $14$
List Factors of $10$ : Step $3$ : List the factors of $10$ . $\newline$ $1 \times 10 = 10$ $\newline$ $2 \times 5 = 10$ $\newline$ Factors of $10$ : $1$ , $2$ , $5$ , $10$
Identify Common Factors: Step $4$ : Identify the common factors of $20$ , $14$ , and $10$ . $\newline$ Factors of $20$ : $1$ , $2$ , $4$ , $5$ , $10$ , $20$ $\newline$ Factors of $14$ : $1$ , $2$ , $14$ $3$ , $14$ $\newline$ Factors of $10$ : $1$ , $2$ , $5$ , $10$ $\newline$ Common factors: $1$ , $2$
Find Greatest Common Factor: Step $5$ : Find the Greatest Common Factor (GCF). The common factors of $20$ , $14$ , and $10$ are $1$ and $2$ . $2$ is greater than $1$ . GCF of $20$ , $14$ , and $10$ : $2$

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