Name:    Try It Out -- Chapter 1, Lesson 1

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:
 a. prime b. composite

4.

The number 159 is
 a. prime b. composite

5.

The number 231 is
 a. prime b. composite

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