Prime Number, GCF & LCM Review

Factors

100

List all of the factors of 32.

1, 2, 4, 8, 16, and 32

200

List the factors of 24 that are PRIME NUMBERS ONLY!

2, 3

300

List all of the factors of 42.

1, 2, 3, 6, 7, 14, 21, 42

400

List all of the common factors of 12 and 20

1, 2, 4

500

List ALL of the factors 36.

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

Multiples

100

List the first 10 multiples of the number 8

8, 16, 24, 32, 40, 48, 56, 64, 72, 80

200

Name any multiple that 2 and 6 have in common!

6, 12, 18, 24, 30, 36, 42, 48, etc.

300

List all the common multiples of 6 and 8 that are less than 50.

24 and 48

400

List all the multiples of 7 that are less than 50.

7, 14, 21, 28, 35, 42, 49

500

Is 175 a multiple of 25?

Yes or No

Yes

Greatest Common Factor

100

What is the greatest common factor of 12 and 15

3

200

What is the greatest common factor of 24 and 20?

4

300

What is the greatest factor of 54 and 36?

6

400

What is the great common factor of 50, 35, and 15?

5

500

What is the greatest common factor of 64 and 80?

16

Least Common Multiple

100

What is the least common multiple of 3 and 7?

21

200

What is the least common multiple of 4 and 9?

36

300

What is the least common multiple of 12 and 6?

12

400

What is the least common multiple of 20 and 12?

60

500

What is the least common multiple of 2, 3, and 5?

30

Word Problems or Prime/Composite

100

Timer A is set to beep every 8 minutes. Timer B is set to beep every 6 minutes. How many minutes will go by until they beep at the same time??

24 minutes

200

List all the Prime Numbers between 0-15

2,3,5,7,11,13

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

Which is a Prime Number?

36, 9, 58, 2

2

500

Johnny baked 36 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers and give to his friends at school. He wants to divide the cookies identically into containers so that each friend has the same amount of each type of cookie. What is the greatest amount of friends he can feed? 

200 pt bonus; How many of each type of cookie will be in the containers?

12 friends

Each container will have 3 oatmeal and 4 chocolate chip