What is the greatest common factor shared by 100 and 30?
10
Get the greatest common factor first. For example, you might use Euclid's Algorithm - the first step is that the greatest common factor of 5030 and 100 is the same as the greatest common factor of 100 and 30 (where 30 is the remainder of the division of 5030 / 100). Once you get the greatest common factor, the common factors of the two numbers are simply all the factors of this greatest common factor.
10 is the GCF of 30, 100, 110.
5
The GCF is 10.
The greatest common factor (GCF) of 20 and 30 is 10.
The GCF is 5.
The greatest common factor of 30 and 39 is 3.
30 is a factor of 150 so 30 is the greatest common factor of 30 and 150
The GCF is 5.
The GCF is 5.