Because factors and divisors are the same thing.
The GCF or GCD of those numbers is 12. The term GCD means greatest common divisor. However a divisor of a number is also called a factor, hence the term GCF instead.In this case 12x12=144and 12x13=156.
The GCF is 1.
The GCF is ab
The GCF is 2.
Because factors and divisors are essentially the same thing.
The GCF is 3.
The GCF is 3.
The GCF is 25.
The GCF is 2.
The GCF is 22.
The GCF is 8.
The GCF is 7.