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Factors
Multiples
Word Problems
Prime/Composite
100

All of the factors of 6

1, 2, 3, and 6

100

First 8 multiples of 3

3, 6, 9, 12, 15, 18, 21, and 24

100

Angelo had a bag of Takis.  Jonathan C. had three more bags of Takis than Angelo had.  How many bags of Takis did they have together?

Angelo = 1 bag
Jonathan C. = 4 bags
*Total = 5 bags*

100

Prime or composite? Why?
5

Prime, only factors are 5 and 1
200

All factors of 12

1, 2, 3, 4, 6, and 12

200
The first 5 multiples of 5
What is 5, 10, 15, 20, and 25?
200

Ms. O'Brien picked 5 times as many flowers as Mrs. Grant.  Mrs. Grant picked 3 flowers.  How many flowers did they pick in all?

Mrs. Grant = 3 flowers
Ms. O'Brien = 3 flowers x 5 = 15 flowers
*Total = 18 flowers*

200

Prime or composite?  Why?
4

Composite, because the factors are 1, 2, 4

300

All factors of 24.

1, 2, 3, 4, 6, 8, 12, and 24

300
The multiples of 20 up to 80
What is 20, 40, 60, and 80?
300

Our portable classroom is 2 times as long as it is wide.  It is 12 feet wide.  What is the perimeter of the classroom, in feet?

width = 12 feet
length = 2 x 12 feet = 24 feet
perimeter = 2(l+w) = 2(12+24) = 2(36) = 72 feet
*P = 72 feet*

300

Prime or composite? Why?
9

Composite, because the factors are 1, 3 and 9
400

Is 5 a factor of 94?

No, because 94 does not end in 0 or 5

400

Is 36 a multiple of 4? Why?

Yes, because 4 x 9 = 36

400

A cafeteria table is 6 times as long as it is wide.  It is 2 feet wide.  What is the area of the table, in square feet?

width = 2 feet

length = 6 x 2 feet = 12 feet
area = l x w = 2 ft x 12 ft = 24 sq ft
*A = 24 square feet*

400

Prime or composite? Why?
23

Prime, because its only factors are 1 and 23

500

Is 7 a factor of 84?

Yes, 84 / 7 = 12

500

Is 48 a multiple of 9? Why?

No, because 9 x 5 = 45 and 9 x 6 = 54

500

There are 52 4th-graders going on a field trip, with 6 chaperones.  They need to ride in cars to get to the BART, but there are only 4 adults to drive them (not the chaperones).  Each car can hold 4 passengers.  What is the minimum number of car trips needed to get everyone to the BART station?

3 cars will make 4 trips, 1 car will make 3 trips

52 students, 6 chaperones
First round: 1 C, 15 S (5 C, 37 S left) (4 cars)
Second round: 1 C, 15 S (4 C, 22 S left) (4 cars)
Third round: 1 C, 15 students (3 C, 7 S left) (4 cars)
Fourth round: 3 C, 7 S in 3 cars (4, 4, 2) (3 cars)

3 cars will make 4 trips, 1 car will make 3 trips
(16 x 4 = 64, but we only need 58 so subtract one car trip)

500

Prime or composite? Why?
24

Composite, because its factors are 1, 2, 3, 4, 6, 8, 12, 24