Algebra Factoring Practice Test Results

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