The GCF of 4 and 9 is 1
The GCF is 9.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF of 9 and 11 is 1.The factors of 9 are 1, 3, 9.The factors of 11 are 1, 11.The GCF of 9 and 11 = 1.Has to be 1 cuz 11 is prime
CF(56, 9) = 1.