1.
Which of the following numbers is prime?
A.
9
B.
1
C.
15
D.
5
Hint
2.
Write the prime factorization of 1500.
A.
2
2
× 3 × 5
2
B.
2
2
× 3 × 5
3
C.
2
2
× 3 × 5
2
× 10
2
D.
2 × 3 × 5
Hint
3.
What are the prime factors of 400?
A.
2, 4, 5
B.
4, 10, 10
C.
2, 5
D.
2, 200
Hint
4.
Which of the following numbers is prime?
A.
57
B.
63
C.
43
D.
75
Hint
5.
Factor 20
ef
.
A.
4 · 5 ·
e
·
f
B.
2 · 2 · 5 ·
e
·
f
C.
2
2
·
e
·
f
D.
2 · 10 ·
e
·
f
Hint