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Wiki User
The factors of 12 are:
1, 2, 3, 4, 6, 12
The factors of 63 are:
1, 3, 7, 9, 21, 63
The common factors are:
1, 3
The Greatest Common Factor (GCF) is:
3
The GCF is 21.
The GCF is 63.
The GCF is 3.
The GCF is 9.
The GCF is 3.It is: 3
The GCF is: 63
The GCF is 7.
The GCF is 1.