The common factors of six and eight are: 1, 2
2
1 and 2
1 and 2
1 and 2
1 and 2.
The GCF is 2.
The factors of 6 are 1, 2, 3 and 6. For them to be common, they need to be compared to another set of factors.
1 and 2
The common factors are: 1, 2, 3, 4, 6, 12
There are only 2, and these are 1 and 2.
16 only has five factors: 1, 2, 4, 8 and 16