The GCF is: 3
The GCF of 39 and 30 is 3. There are no further divisible numbers in common. This leaves you with 13 and 10 respectively.
The GCF is 3.
The GCF is 39.
The greatest common factor of 30 and 39 is 3.
The GCF of 39 & 14 is 1.
The GCF is 1
The GCF is: 13
The GCF is 1.
The GCF is 3.
The GCF is 1.
The GCF is 3.
The GCF is 39.
The GCF of 13, 39 is 13.