Algebra Factoring Practice Test Results

Question 1
67% answer correctly
Which of the following is a composite number?
6
11
31
17
Question 2
76% answer correctly
Which of the following sets of factors do 68 and 60 have in common?
{1, 2, 4, 128}
{1, 2, 4}
{17, 34, 68}
{4, 17, 34, 68}
Question 3
72% answer correctly
Which of the following is a composite number?
23
19
5
4