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 Greatest Common Factor (GCF) is: 1
The GCF is 1.The GCF of 14, 21 and 24 is 1.