Algebra Factoring Practice Test Results

Question 1
71% answer correctly
Which of the following is not a composite number?
28
17
9
38
Question 2
79% answer correctly
What`s the greatest common factor of 36 and 44?
2
1
8
4
Question 3
94% answer correctly
Which of the following is not a multiple of 3?
12
15
20
24