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?
30
3 and 5 have no common multiples
16
15
Question 3
86% answer correctly
What`s the least common multiple (LCM) of 8 and 5?
20
160
40
80