Question

What is the greatest common factor of 3 and 6?

Answer 1

3 is, since you can divide both 6 and 3 by 3.

Simply look at the factors for each,
1, 3 for 3
1, 2, 3, 6 for 6.  

Answer 2

GCF is the greatest common factor, meaning, the largest number that fits into both numbers. The largest number that goes into 3 and 6 evenly is 3.

:)