Since 4 is a factor of 20, it is automatically the GCF.
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The GCF of 4 and 8 is 4.
Since 4 is a factor of 16, it is automatically the GCF.
The Greatest Common Factor (GCF) of 20, 24, and 60 is 4
The GCF of 4, 12, and 20 is 4The GCF is: 4
The greatest common factor of 12 and 20 is 4