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Anonymous
The GCF is 3.
Wiki User
The GCF of 12 and 81 is 3.
The GCF of 15 and 81 is 3.
405
The GCF of 12 and 15 is 1
The GCF is 1.
GCF(15, 12, 45) = 3
GCF(12, 15, 18) = 3
The GCF of 9, 12, 15 is 3.