Download Name - Hewlett

Name ______________________
Number Theory Review
Date _____________
Period ____________
1) What is the 5th prime number
2) Which is not a composite number?
a) 45
b) 1
c) 72
d) 9
3) Which is the composite number for the prime factorization
2 2 • 3 • 5 2 ? (In other words, what does this equal?)
a)300
b) 30
c) 60
d) 150
1) Is 1 prime, composite, or neither?
a) prime
b) composite
2) Find the LCM of 100 and 225?
a)900
b)1200
3) Find the GCF of 120 and 80?
a) 2
b) 20
c)neither
c)1300
c) 40
d) 25
d) 80
4) What is the only even prime number?
a) 1
b) 2
c) 4
5) Which lists all the factors of 72?
a) 72, 144, 216
b) 1, 2, 3, 4, 6, 8, 9
c) 1, 2, 3, 4, 6, 8, 9, 12, 24, 72
d) 100
d) 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
6) Which list shows only multiples of 15?
a) 1, 3, 5, 15, 30
b) 1, 15, 30
7) What is the prime factorization of 32?
a) 4 • 8
b) 4 • 4 • 8
c) 3 • 2
c) 45, 60, 90
d) 15, 51
d) 2 • 2 • 2 • 2 • 2
8) If the prime factors of a number are 2, 3, 5, and 5, what is the
number?
a) 150
b) 130
c) 50
d) 15
Find the GCF and LCM of the following sets of numbers:
9) 90, 180
10) 24,84,168
11) 24, 48, 136
12) 24, 36, 42
13) 45, 10, 30
14) 35, 25, 49
15) 100, 300, 600