Algebra Factoring Practice Test Results

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