Algebra Factoring Practice Test Results

Question 1
67% answer correctly
Which of the following is a composite number?
31
17
11
6
Question 2
90% answer correctly
What`s the least common multiple (LCM) of 7 and 2?
14
42
28
56
Question 3
68% answer correctly
Which of the following sets of factors do 28 and 36 have in common?
{1, 2, 4}
{4, 7, 14, 28}
{0, 1, 2, 4}
{7, 14, 28}