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13 is a factor of both 78 (6 times) and 104 (8 times).

Since 13 is also obviously a factor of itself, it must be the greatest factor

that's common to all three numbers.

(If there were a greater one, then 13 would have a factor greater than itself.)

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Wiki User

15y ago

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More answers

The GCF is 13.

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Wiki User

9y ago
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5

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Anonymous

4y ago
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