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7.
7x7=49.
7x11=77.
7x12=84.
The GCF is 7.
The Greatest Common Factor (GCF) is: 7
The GCF is 7.7 is the GCF of 42, 49 and 84.
The GCF is 1.
The GCF is 7.The GCF is 7.
The GCF is: 7