The GCF is 1.
GCF of 21 and 42: 21GCF of 16 and 25: 1
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
The GCF is 1.
16 and 21
2 2*21 = 42 2*8 = 16
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 21.
The GCF is 1.The GCF of 14, 21 and 24 is 1.
The Greatest Common Factor (GCF) is: 1