Algebra Factoring Practice Test Results

Question 1
67% answer correctly
Which of the following is a composite number?
17
6
31
11
Question 2
76% answer correctly
Which of the following sets of factors do 68 and 60 have in common?
{1, 2, 4}
{4, 17, 34, 68}
{17, 34, 68}
{1, 2, 4, 128}
Question 3
68% answer correctly
Which of the following sets of factors do 28 and 36 have in common?
{1, 2, 4}
{0, 1, 2, 4}
{7, 14, 28}
{4, 7, 14, 28}