Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.

 1.  Select the term to complete the sentence.
A number that has only two factors, 1 and itself is called a _____
number.
a.  composite  c.  factor  b.  natural  d.  prime     

 2.  Select the term to complete the sentence.
A number that has more than two factors is called a _____
number.
a.  composite  c.  factor  b.  natural  d.  prime     

 3.  The
number 37 is:

 4.  The
number 159 is

 5.  The
number 231 is

 6.  Select the numbers between 40 and 50 that are prime.
a.  42, 44, 46,
48  b.  41, 43, 45, 47,
49  c.  41, 43,
47   

 7.  Twin primes are pairs of primes that differ by 2.
Select the pair of twin primes.
a.  2,
3  c.  29,
31  b.  7,
9  d.  47,
49     

 8.  Select the list which contains only prime numbers
a.  5, 13,
21  c.  101, 103,
105  b.  7, 8,
9  d.  31, 37,
41     

 9.  Select the set of numbers between 100 and 120 that are prime.
a.  102, 104, 106,
108, 110, 112, 114, 116, 118  b.  101, 103, 105, 107, 109, 111, 113, 115, 117,
119  c.  101, 103, 107,
109, 111, 113, 117, 119  d.  101, 103, 107, 109, 113   

 10.  To
show a number is composite it must have factors other than 1 and itself.
Select the factors of 1 and 39.
a.  1,
39  b.  1, 2, 19,
39  c.  1, 3, 13,
39   
