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Anonymous
You don't; you need at least two numbers to find a GCF.
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You need two or more numbers to find a GCF.
The GCF is 26.
The GCF is 39.
The GCF is 6.
the GCF of 84 and 78 is: 6 the common factors of 78 and 84 are: 1,2,3, and 6