Algebra Factoring Practice Test Results

Question 1
67% answer correctly
Which of the following is a composite number?
11
31
6
17
Question 2
76% answer correctly
Which of the following sets of factors do 68 and 60 have in common?
{1, 2, 4}
{1, 2, 4, 128}
{4, 17, 34, 68}
{17, 34, 68}
Question 3
90% answer correctly
What`s the least common multiple (LCM) of 7 and 2?
42
14
56
28