Algebra Factoring Practice Test Results

Question 1
90% answer correctly
What`s the least common multiple (LCM) of 7 and 2?
42
14
28
56
Question 2
71% answer correctly
Which of the following is not a composite number?
38
17
9
28
Question 3
94% answer correctly
Which of the following is not a multiple of 3?
12
15
20
24