Answer:
Factors of 6 are,6,3,2,1
and factors of 7 are, 7,1
Step-by-step explanation:
The common factors of 6 and 7 are 1, intersecting the two sets above.
In the intersection factors of 6 factors of 7 the greatest element is 1.
Therefore, the greatest common factor of 6 and 7 is 1.