Algebra Factoring Practice Test Results

Question 1
67% answer correctly
Which of the following is a composite number?
11
6
17
31
Question 2
76% answer correctly
Which of the following sets of factors do 68 and 60 have in common?
{17, 34, 68}
{1, 2, 4}
{1, 2, 4, 128}
{4, 17, 34, 68}
Question 3
89% answer correctly
Which of the following is not a multiple of 6?
24
30
56
36