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The GCF is 27b.
The GCF is 27.
GCF(66, 27) = 3.
The GCF is 9.
The GCF is ab
The GCF is b.
The GCF of 27 and 81 is 27. And their LCM is 81.
The GCF is a.
The GCF of 27, 135 is 27.