Algebra Factoring Practice Test Results

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