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Factors of 60:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Factors of 51:
1, 3, 17, 51.
The answer is 3.
The GCF is 17.
The GCF is 1.
The GCF of 42 and 51 is 3.
255 = 51 x 5 so 51 is GCF
The GCF is: 3
The GCF is 3.
The GCF for 29 51 is 1.
The GCF of 39 and 51 is 3.3