Algebra Factoring Practice Test Results

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