1.
The LCM of 5
rs
2
and 4
st
is ____ .
A.
20
rs
2
t
B.
20
rt
C.
20
s
2
D.
20
rst
Hint
2.
Find the least common denominator for
and
A.
4
e
2
f
B.
36
e
2
f
C.
48
e
2
f
D.
30
e
2
f
Hint
3.
Find the LCM of 12
a
2
b
and 10
b
2
c
.
A.
80
a
2
b
3
c
B.
60
a
2
b
2
c
C.
60
a
2
b
2
c
2
D.
40
a
2
b
c
Hint
4.
Find the LCD of
and
A.
24
B.
12
C.
18
D.
10
Hint
5.
Find the LCD of
and
A.
15
ab
2
c
B.
15
abc
C.
15
a
2
b
2
c
D.
15
ab
2
Hint