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Anonymous
It took me all day to figure this out but I finally got the answer.....
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The GCF of 6, 9, and 18 is 3
The GCF is 3.
GCF(9, 6, 18) = 3.
The greatest common factor of 18 21 and 42 is 3.
The greatest common factor is 6.
The GCF is 6.
6
If you mean 18, 42 and 36 then the GCF is 6