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The GCF is 4.
GCF(28, 48, 56) = 4.
The gcf of 56 and 48 is 8. The lcm of 56 and 48 is 336.
The GCF is 28.
The GCF of 56, 196, and 28 is 28.
GCF(28, 56, 84) = 28
The GCF is 14.
The GCF is 7.