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The GCF is: 3
the GCF of 45 48 and 18 is 3
The GCF of 21, 45, and 48 is: 3
The GCF of 15, 45, and 48 is 3.
The GCF is: 48
The GCF is 48.
The GCF is 45.
The GCF is 1.
The GCF is 12.