FACTORS AND GREATEST COMMON FACTORS

Factors

100

Name all the factors of 2

1, 2, 

200

Name all the factors of 6

1, 2, 3, 6

300

Name all the factors of 10

1, 2, 5, 10

400

Name all the factors of 50

1, 2, 5, 10, 25, 50

500

Name all the factors of 24

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

Multiples

100

Name 1 multiple of 10

10, 20, 30, 40, 50, 60, etc.

200

Name 3 multiples of 2

Any multiple of 2 works (All even numbers except 0)

300

Name 2 multiples of 12

Any of the following is correct: 

12, 24, 36, 48, 60, etc. 

400

Name 4 multiples of 5

Any multiple of 5 (Any numbers 5 or greater that end in 0, or 5)

500

Name 3 multiples of 9 

Any multiples of 9 work.

 9, 18, 27, 36, 45, etc. 

Factor Pairs

100

What is one factor pair with a product of 12.

12 x 1

6 x 2

3 x 4

200

What is one factor pair with a product of 30? 

1 x 30

2 x 15

3 x 30

5 x 6

300

What is one factor pair with a product of 36

1 x 36

9 x 4

2 x 18

3 x 23

6 x 6

400

What is one factor pair with a product of 45?

1 x 45

3 x 15

5 x 9

500

What factor is paired with 8 to get a product of 32. 

4

Greatest Common Factor

100

What is the GCF of 4 and 10

2

200

What is the GCF of 8 and 16

8

300

What is the GCF of 12 and 20

4

400

What is the GCF of 27 and 36

9

500

What is the GCF of 24 and 56

8

Word Problems

100

Jenna has 12 green pompoms.  Her friend Sally has 20 blue pompoms.  What is the greatest number of boxes they will need to group the same number of green and blue pompoms together in each box?

12: 1, 12, 3, 4, 2, 6

20: 1, 2, 10, 20, 5, 4

The GCF is 4. 

200

Bob has 10 colored pencils. His friend Greg has 15 markers to divide into containers for class.  If Bob wants to have the same number of colored pencils and the same number of markers, what is the greatest number of containers Bob will need?  

10: 1, 2, 5, 10

15: 1, 3, 5, 15

GCF: 5

300

Mr. Nelson has 30 carrot sticks.  Mrs. Nelson has 40 celery sticks.  What is the greatest number of cups they will need to group the same number of carrot sticks and celery sticks in each cup?

30: 1, 2, 3, 10, 15, 30

40: 1, 2, 4, 5, 8, 10, 20

GCF: 10

400

The builder has 36 nails.  He also has 48 washers. What is the greatest number washers and nails that he can group together?

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

48: 1, 2, 4, 6, 8, 16, 24, 12, 

GCF:  12

500

The boy has 16 bats and 24 balls. What is the greatest number of groups of bats and balls that he can group together so that there are an equal number of bats and balls in each group?

16: 1,2,4, 8, 16

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

GCF: 8