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Prime Factorization Worksheets - Page 2

Prime Factorization Worksheets
  • Page 2
 11.  
Identify a prime number.
a.
23
b.
39
c.
21
d.
25


Answer: (a)


Correct answer : (1)
 12.  
Which of the following is equivalent to 8 × 8 × 8 × 8 × 8?
a.
84
b.
85
c.
8(5)
d.
58


Answer: (b)


Correct answer : (2)
 13.  
Identify the equivalent form of 11 × 11 × 11 × 11.
a.
115
b.
11(5)
c.
411
d.
114


Answer: (d)


Correct answer : (4)
 14.  
Find the prime factorization of 576.
a.
42 × 32
b.
25 × 32
c.
26 × 32
d.
29 × 32


Answer: (c)


Correct answer : (3)
 15.  
Which of the following is the prime factorization of 220?
a.
22 × 5 × 11
b.
22 × 3 × 11
c.
2 × 5 × 11
d.
23 × 5 × 11


Answer: (a)


Correct answer : (1)
 16.  
Which of the following is the prime factorization of 196?
a.
2 × 73
b.
24 × 7
c.
23 × 72
d.
22 × 72


Answer: (d)


Correct answer : (4)
 17.  
Find the prime factorization of 242.
a.
22 × 112
b.
2 × 112
c.
22 × 11
d.
2 × 3 × 112


Answer: (b)


Correct answer : (2)
 18.  
Which of the following is the expanded form of 107?
a.
10 × 7
b.
10 × 10 × 10 × 10 × 10 × 10 × 10
c.
7 × 7 × 7 × 7 × 7 × 7 × 7 × 7 × 7 × 7
d.
7 × 7 × 7 × 7 × 7 × 7 × 7


Answer: (b)


Correct answer : (2)
 19.  
Identify a prime number.
a.
33
b.
9
c.
57
d.
13


Answer: (d)


Correct answer : (4)
 20.  
Which of these numbers is a prime number?
a.
121
b.
17
c.
51
d.
21


Solution:

A number that has only two factors, one and itself is called a prime number.

17 is a prime number as it has only two factors, 1 and 17.


Correct answer : (2)

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