Name:    6th Grade Math- Apply number theory concepts (prime, composite, prime factorization) Practice Test 4

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

1.

Which number below is not prime?
 a. 239 c. 57 b. 179 d. 89

2.

What makes 12 a composite number?
 a. it is devisable by 1 and 12 c. factors of 3 and 4 are part of its factorization b. it has more than 2 factors d. it is not a composite number

3.

Which of the sets of numbers below are factors for a composite number?
 a. 2, 3, 1, 6 c. 1, 13 b. 1, 3 d. 1, 17

4.

Which of these numbers below finishes the prime factorization of 56?
2 x 2 x 2 x _____
 a. 3 c. 7 b. 13 d. 9

5.

What numbers below have the common factors of 8, 24, 2
 a. 32 c. 12 b. 56 d. 48

6.

Which number below is a common factor of:  9   27   39   102?
 a. 2 c. 5 b. 3 d. 13

Numeric Response

7.

What factor is missing in the prime factorization of 18?
2 x 3 x ____

8.

What number is the prime factorization for 27?

9.

Finish the prime factorization for the number 242.

11 x 2 x ________

10.

Write a prime factorization equation for 243.  (write the numbers from least to greatest value and put a space between each symbol; i.e. 1 x 2 x 3)

11.

List the lowest common multiple of 2, 4 and 6.

12.

List the lowest common multiple of 11, 12 and 3.

13.

What number is the first common multiple of 2, 3, and 4?

14.

What number is the first common multiple of 6, 9, and 5?

15.

What is the first common multiple of 13 and 5?