Algebra Factoring Practice Test Results

Question 1
71% answer correctly
Which of the following is not a composite number?
28
38
9
17
Question 2
79% answer correctly
What`s the greatest common factor of 36 and 44?
1
8
2
4
Question 3
86% answer correctly
What`s the least common multiple (LCM) of 8 and 5?
80
160
40
20