Algebra Factoring Practice Test Results

Question 1
80% answer correctly
What`s the greatest common factor of 8 and 28?
8
1
2
4
Question 2
75% answer correctly
What`s the least common multiple (LCM) of 3 and 5?
16
15
30
3 and 5 have no common multiples
Question 3
74% answer correctly
What`s the greatest common factor of 16 and 4?
4
1
8
2