1.
Based on the factor trees, what is the greatest common factor of 8 and 20?
A.
8
B.
2
C.
20
D.
4
Hint
2.
What is the greatest common factor of 25
a
2
b
and 5
ab
2
?
A.
5
ab
B.
5
ab
2
C.
5
D.
5
a
2
b
2
Hint
3.
What is the greatest common factor of 16
x
2
and 12
x
?
A.
4
x
2
B.
4
x
C.
12
x
D.
16
x
2
Hint
4.
What is the greatest common factor of 39 and 18?
A.
6
B.
9
C.
3
D.
13
Hint
5.
What is the greatest common factor of 14
p
2
q
and 42
p
3
q
2
?
A.
7
p
2
q
2
B.
7
pq
C.
14
pq
D.
14
p
2
q
Hint