Find the greatest common factor of 42-28
To find the greatest common factor of 42 and 28, we can list out the factors of each number and find the largest factor they have in common.
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42.
The factors of 28 are: 1, 2, 4, 7, 14, 28.
The largest factor they have in common is 14.
Therefore, the greatest common factor of 42 and 28 is 14.