1.
What is the greatest common factor of 45, 75, and 135?
A.
5
B.
15
C.
9
D.
25
Hint
2.
Find the greatest common factor of 64
ab
3
c
2
and 48
a
2
b
2
c
.
A.
16
abc
B.
16
ab
2
c
C.
8
a
2
b
2
c
2
D.
8
ab
3
c
Hint
3.
What is the greatest common factor of 18
mn
2
, 54
m
4
, and 80
n
3
?
A.
18
m
2
n
3
B.
9
mn
C.
2
D.
2
mn
2
Hint
4.
Find the GCF of 17
r
4
s
4
and 23
r
s
4
.
A.
r
s
4
B.
17
r
s
4
C.
r
4
s
4
D.
rs
Hint
5.
Factor 7
x
+ 21.
A.
x
(7 + 21)
B.
7
x
(1 + 21)
C.
7(
x
+ 3)
D.
7(
x
+ 21)
Hint