20 is the answer. The GCF of 20 and 100 is 20.
The factors of 20: 1, 2, 4, 5, 10, 20.
The factors of 100: 1, 2, 4, 5, 10, 20, etc.
That's all I'm going to go because you only need up to 20. :]
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The GCF is 20.
GCF(60, 40, 100) = 20.
The GCF is 20.
If that's 60 and 100, the GCF is 20.
The greatest common factor (GCF) is: 20