Factors of 25: 1, 5, and 25
Factors of 35: 1, 5, 7, and 35
Common factors (numbers on both lists): 1 and 5
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The greatest common factor (GCF) is: 7.7
The greatest common factor of 7, 35 and 49 is 7.
The GCF is 7.
The GCF is 7.
21 and 35's highest common factor is seven.