21 and 80's highest common factor is one.
You are 12-20. The only common factor of 11 and 21 is 1.
The greatest common factor of 21 and 77 is 7.
The GCF is 7.
The Greatest Common Factor of 21, 63, 84: 21
The Greatest Common Factor of 21, 9 is 3.
The Greatest Common Factor (GCF) is: 3
You are 12-20. The only common factor of 11 and 21 is 1.
It's 3
The GCF is 3.
The GCF is 3.
The GCF is 1.
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
The GCF is 7.
The greatest common factor of 21 and 77 is 7.
The GCF is 7.
The GCF is 21.
The GCF is 3.