Since 4 is a factor of 20, it is automatically the GCF.
The GCF is 4.
Since 4 is a factor of 20, it is automatically the GCF.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF is 4.
The GCF of 8, 20, and 36 is 4.