Factors and Multiples

Factors

100

How many factors does the number 12 have?

The number 12 has 6 factors.

200

How many factor pairs are in the number 36?

The number 36 is made up of 5 factor pairs.

300

List all the factor pairs for the number 48.

1 x 48, 2 x 24, 3 x 16, 4 x 12, 6 x 8

400

Jim listed out all of the factors for the number 24. 

1, 2, 4, 6, 12, and 24.

Is Jim correct? Why or why not?

No, Jim is not correct. He is missing the factor pair 3 x 8.

500

List all the factors for the number 30 AND circle the factors of 30 that are prime.

1, 2, 3, 5, 6, 10, 15, and 30.

The prime factors of 30 that should be circled are 2, 3, and 5. 

Multiples

100

List the first five multiples of the number 6.

6, 12, 18, 24, 30

200

What is the missing multiple of the number 8?

24, 32, __, 48, 56

40

300

Find the missing multiple.

12, 16, 20, ___, 28

24

400

Which number is multiple of both 8 and 5?

A. 20

B. 24

C. 30

D. 40

D. 40

500

Which list contains only multiples of 3?

A. 15, 18, 24, 26

B. 15, 18, 27, 30

C. 12, 15, 21, 25

D. 12, 15, 26, 29

B. 15, 18, 27, 30

Prime or Composite?

100

Is the number 13 prime or composite?

Prime

200

What makes a number composite?

A composite number has more than one factor pair. 

300

How many factor pairs does a prime number have?

A prime number has only 1 factor pair, one and itself.

400

Which set of numbers contains only prime numbers?
A. {2, 9, 11, 13} 

B. {1, 2, 3, 5}

C. {2, 7, 11, 15}

D. {2, 7, 13, 19}

D. {2, 7, 13, 19}

500

Which set of numbers contains exactly 2 prime numbers and 2 composite numbers?

A. {2, 4, 6, 8}

B. {2, 7, 9, 15}

C. {2, 11, 13, 19}

D. {2, 9, 15, 21}

B. {2, 7, 9, 15}

Word Problems 1

100

Lily's classroom is a composite number. Which classroom could be Lily's?

A. 33

B. 41

C. 47

D. 51

A. 33

200

Delilah arranged seashells into four rows. The same number of seashells were in each row. What could be the total number of seashells Delilah arranged?

A. 14

B. 15

C. 16

D. 18

C. 16

300

Liv's Bakery is packaging cupcakes into boxes. Each box can hold 6 cupcakes. What could be the total number of cupcakes Liv's Bakery has packaged if all boxes were full?

A. 26

B. 28

C. 30

D. 32

C. 30

400

All expressions below have a sum of 8. Which expression below contains only prime numbers?

A. 2 + 6

B. 7 + 1

C. 5 + 3

D. 4 + 4

C. 5 + 3

500

This equation shows a number multiplied by 5.

n x 5 = __

Which statement is true about the product?

A. It is a factor of 8.

B. It is a multiple of 8.

C. It is a prime number.

D. It is an odd number.

B. It is a multiple of 8. 

Word Problems 2

100

Johnny's mother told him to go pick a number of apples that is prime. Which number could be the number of apples Johnny picked?

A. 5

B. 6

C. 8

D. 9

A. 5

200

What is the only even prime number?

2

300

What are all the prime numbers on a clock face?

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12

2, 3, 5, 7, and 11

400

Mr. Robeson's class is trying to guess what number he is thinking of. He tells his class the following:

- The number is a multiple of 2.
- The number is a multiple of 5.
- The number only has 4 factors.

What number could Mr. Robeson be thinking of?

A. 10

B. 12

C. 15

D. 20

A. 10

500

Mrs. Lincoln divided her class into 7 equal groups for a field trip. Which of the following could be the number of students in Mrs. Lincoln's class?

A. 20, 27, 34, or 41

B. 18, 24, 30, or 36

C. 21, 28, 35, or 42

D. 14, 22, 30, or 38 

C. 21, 28, 35, or 42