You need at least two numbers to find a GCF.
The GCF is 30.
The GCF is 30.
The GCF of 11 and 44 is 11. The GCF of 20 and 30 is 10. The GCF of 5 and 11 is 1. The GCF of all of them is 1.
The GCF of 120, 150, and 180 is 30. The GCF of a set can't be larger than the smallest difference between numbers in the set, which, in this case, is 30. Since 30 is a factor of all of the numbers of the set, it is the GCF.
The GCF is: 1
The GCF is 3.
The GCF is 30.
The GCF of 78 and 30 is 6.
The GCF is 5.
The GCF is 3.
The GCF is 1.
The GCF is 1.