Algebra Factoring Practice Test Results

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