Algebra Factoring Practice Test Results

Question 1
75% answer correctly
What`s the least common multiple (LCM) of 3 and 5?
16
15
3 and 5 have no common multiples
30
Question 2
93% answer correctly
What`s the least common multiple (LCM) of 9 and 2?
18
72
36
54
Question 3
93% answer correctly
What`s the least common multiple (LCM) of 9 and 2?
36
72
54
18