Algebra Factoring Practice Test Results

Question 1
80% answer correctly
What`s the greatest common factor of 8 and 28?
1
4
8
2
Question 2
75% answer correctly
What`s the least common multiple (LCM) of 3 and 5?
15
30
16
3 and 5 have no common multiples
Question 3
94% answer correctly
Which of the following is not a multiple of 9?
45
54
65
27