Algebra Factoring Practice Test Results

Question 1
72% answer correctly
Which of the following is a composite number?
4
23
5
19
Question 2
66% answer correctly
What`s the least common multiple (LCM) of 9 and 7?
63
9 and 7 have no common multiples
64
252
Question 3
68% answer correctly
Which of the following sets of factors do 28 and 36 have in common?
{4, 7, 14, 28}
{0, 1, 2, 4}
{1, 2, 4}
{7, 14, 28}