Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 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 | | | | |
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| 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 | | | | |
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| 3. | The
number 37 is:
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| 4. | The
number 159 is
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| 5. | The
number 231 is
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| 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 | | |
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| 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 | | | | |
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| 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 | | | | |
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| 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 | | |
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| 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 | | |
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