1.
Which number is
not
a composite number?
A.
111
B.
27
C.
29
D.
63
Hint
2.
Select the correct factorization.
A.
66
ax
3
= 2 · 33 ·
a
·
x
·
x
B.
52
b
2
c
= 2 · 2 · 13 ·
b
·
b
·
c
C.
–49
z
3
b
2
= –1 · 7 · 7 ·
z
·
z
·
b
·
b
D.
57
axy
2
= 57 ·
a
·
x
·
y
·
y
·
y
Hint
3.
Find the GCF of 30, 45, and 75.
A.
5
B.
15
C.
6
D.
10
Hint
4.
Which factor tree best represents 468?
A.
B.
C.
D.
Hint
5.
Elaine needs to make a rectangular poster with an area of 30 square centimeters. She needs to use an e
x
pensive border around the perimeter of the poster. Assuming they are whole numbers, find the length and width so that the poster has the least perimeter.
A.
15 cm by 2 cm
B.
1 cm by 30 cm
C.
5 cm by 6 cm
D.
10 cm by 3 cm
Hint