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Anonymous
Since 3 is a factor of 6, it is automatically the GCF.
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GCF of 6 and 3 is 3.
The GCF is 3.
The GCF of 6 and 81 is 3.
2 numbers have a gcf of 3 = 3 & 6, 6 &9,...
6 = 2 x 3 9 = 3 x 3 15 = 3 x 5 GCF = 3