1.
Which of the following values is prime?
A.
72
B.
53
C.
96
D.
81
Hint
2.
Factor -180
x
2
y
2
A.
2
2
· 3
2
· 5 ·
x
·
x
·
y
·
y
B.
4 · 9 · 5 ·
x
·
x
·
y
·
y
C.
-1 · 2
2
· 9 · 5 ·
x
·
x
·
y
·
y
D.
-1 · 2
2
· 3
2
· 5 ·
x
·
x
·
y
·
y
Hint
3.
Is 57 prime or composite? If it is composite, what is its factorization?
A.
composite, 3 × 17
B.
composite, 2 × 29
C.
prime
D.
composite, 3 × 19
Hint
4.
Find the prime factorization of -198.
A.
2 · 3
2
· 10
B.
2 · 3
2
· 11
C.
–1 · 2 · 3
2
· 11
D.
–1 · 2 · 3
2
· 10
Hint
5.
Is 79 prime or composite? If it is composite, what is its factorization?
A.
composite, 7 × 11
B.
prime
C.
composite, 3 × 23
D.
composite, 13 × 6
Hint