Algebra Factoring Practice Test Results

Question 1
86% answer correctly
What`s the least common multiple (LCM) of 8 and 5?
160
40
80
20
Question 2
66% answer correctly
What`s the least common multiple (LCM) of 9 and 7?
63
64
9 and 7 have no common multiples
252
Question 3
71% answer correctly
Which of the following is not a composite number?
28
17
9
38