It is: 9
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The GCF is 3.
The GCF is 3.
The GCF of 18, 27, and 78 is 3.18=2*3*327=3*3*378=2*3*13GCF=3
If you mean 18, 27 and 63 then the GCF is 9
The GCF of 18, 4 and 27 is 1. I saw this straight away as 4 only has factors of 4, 2 and 1. 4 or 2 don't go into 27. Therefore the GCF has to be 1.