Algebra Factoring Practice Test Results

Question 1
80% answer correctly
What`s the greatest common factor of 8 and 28?
1
8
4
2
Question 2
75% answer correctly
What`s the least common multiple (LCM) of 3 and 5?
15
3 and 5 have no common multiples
16
30
Question 3
86% answer correctly
What`s the least common multiple (LCM) of 8 and 5?
80
20
40
160