Algebra Factoring Practice Test Results

Question 1
68% answer correctly
Which of the following sets of factors do 28 and 36 have in common?
{4, 7, 14, 28}
{7, 14, 28}
{0, 1, 2, 4}
{1, 2, 4}
Question 2
82% answer correctly
Which of the following is not a composite number?
10
44
6
29
Question 3
80% answer correctly
What`s the greatest common factor of 8 and 28?
8
1
4
2