Answer:
If you just want to know what is the greatest common factor of 12 and 42, it is 6. Usually, this is written as
Step by step explanation:
gcf(12,42) = 6
The gcf of 12 and 42 can be obtained like this:
The factors of 12 are 12, 6, 4, 3, 2, 1.
The factors of 42 are 42, 21, 14, 7, 6, 3, 2, 1.
The common factors of 12 and 42 are 6, 3, 2, 1, intersecting the two sets above.
In the intersection factors of 12 ∩ factors of 42 the greatest element is 6.
Therefore, the greatest common factor of 12 and 42 is 6.