6th Grade GCF and LCM Review

Factors

100

What are the Factors for 12

1, 2, 3, 4, 6, 12

1 x 12         2 x 6         3 x 4

200

List the Factors of 24

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

1 x 24    2 x 12    3 x 8     4 x 6

300

List the factors of 77

1, 7, 11, 77

1 x 77    7 x 11

400

What are the factors of 50

1, 2, 5, 10, 25, 50

1 x 50

2 x 25

5 x 10

500

List the factors of 100

1, 2, 4, 5, 10, 20, 25, 50, 100

1 x 100      2 x 50        4 x 25     5 x 20       10 x 10

Multiples

100

List the first five multiples of 10

10,20,30,40,50

200

List the first five multiples of 12

12,24,36,48,60

300

List the first five multiples of 14

14, 28, 42, 56, 70 

400

List the first five multiples of 20

20, 40, 60, 80, 100

500

What are the first 5 multiples to 40

40, 80, 120, 160, 200

GCF

100

Find the GCF of 12 & 15

GCF=3

200

Find the GCF of 20 & 30

GCF= 10

300

What is the GCF of 26 and 24

GCF = 2

400

Find the GCF of 24 & 36

GCF=12

500

Find the GCF of 7 & 21

GCF=7

LCM

100

Find the LCM of 4 & 8

LCM=8

200

What is the LCM of 5 and 15

LCM = 15

300

Find the LCM of 4 & 22

LCM=44

400

Find the LCM of 20 & 40

LCM= 20

500

Find the LCM of 24 and 36

LCM=72

Random

100

Is 13 Prime or Composite

Prime

200

Is 66 Prime or Composite?

Composite

300

What is the Prime Factorization (Factor Tree) for 20

2 x 2 x 5

400

What is the Prime Factorization (Factor Tree) for 44

2 x 2 x 11

500

What is the Prime Factorization (Factor Tree) for 64?

2 x 2 x 2 x 2 x 2 x 2  OR   2⁶