What is the greatest common factor of 42 and 86?
The GCF of 42 and 86 is 2.
One way to determine the common factors and greatest common
factor is to find all the factors of the numbers and compare
them.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42.
The factors of 86 are 1, 2, 43, and 86.
The common factors are 1 and 2. Therefore, the greatest common
factor is 2.