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Anonymous
the only whole number gcf is "1".
Wiki User
The GCF is 1.
The GCF of 9 and 20 is 1
The GCF is 1
The GCF is 4.
The GCF is 20.
The GCF is 9.
gcf of 80 and 100 is 20.The GCF is 20.