7
The GCF is 7.
7, 14 and 21
7 
The GCF is 3.
The greatest common factor of the numbers 21 and 84 is 21.
The GCF is 3.
7. 7x3=21 7x8=56
The Greatest Common Factor of 14 and 21 is 7.
7 is the greatest common factor of 14 and 21.
The Greatest Common Factor of 21, 24, 14: 1
The Greatest Common Factor of 81, 21, and 14 is 1.
The Greatest Common Factor of 60, 14, 21: 1