Factors and Multiples
Prime and Composite
Greatest Common Factor
Least Common Multiple
Word Problems
100

List 2 common multiples of 8 and 12. 

24, 36, etc

100

Which number is prime? A. 20 B. 15 C. 10 D. 5

D. 5

100
What is the greatest common factor of 12 and 15
3
100
What is the least common multiple of 3 and 7?
21
100
Timer 1 is set to beep every 8 minutes. Timer 2 is set to beep every 6 minutes. How many times will they beep at the same time in 30 minutes?
1
200
List all of the common factors of 12 and 20.
1, 2, and 4
200

Which number is composite? A. 4 B. 5 C. 11 D. 17

A. 4

200
What is the greatest common factor of 24 and 20?
4
200
What is the least common multiple of 4 and 9?
36
200
You bring snacks for your basketball team every fifth game. Every third game is a home game. When will be the first time that you bring snacks to a home game?
15th game
300
List all of the factors of 42.
1, 2, 3, 6, 7, 14, 21, 42
300

Which answer to the following is a prime number? A. 3 + 4 B. 15 -5 C. 2 + 2 D. 9 - 3

A. 3 + 4= 7

300
What is the greatest factor of 16 and 36?
4
300
What is the least common multiple of 2, 3, and 5?
30
300
Sarah is making bead necklaces. She has 60 blue beads and 72 green beads. What is the greatest number of identical necklaces she can make if she wants to use all the beads?
6
400

List 4 multiples of 7 greater than 10 and less than 50 

14, 21, 28, 35, 42, 49

400

Which answer to the following is a composite number? A. 3 + 2 B. 2 + 0 C. 7 + 4 D. 8 + 1

D. 8 + 1

400
What is the great common factor of 50, 35, and 15?
5
400
What is the least common multiple of 20 and 12?
60
400
Three pigs entered a race around a track. Piggly takes 12 minutes to run one lap. Piglet takes 6 minutes to run one lap and it takes Wiggly 16 minutes to run one lap. If all three pigs begin the race at the same time, how many minutes will it take for all three pigs to be at the starting point again?
48 minutes
500
List all of the common factors of 24 and 36.
1, 2, 3, 4, 6, 12
500

Is 36 a prime or composite number? If it is a composite number, list its factors.

composite; 1, 2, 3, 4, 6, 9, 12, 18, 36

500
What is the greatest common factor of 64 and 80?
16
500
What is the least common multiple of 21 and 24?
168
500
Johnny baked 36 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for his teacher friends at school. He wants to divide the cookies into identical containers so that each container has the same number of each kind of cookie. If he wants each container to have the greatest number of cookies possible, how many plastic containers does he need?
12 plastic containers
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