Prime Factorization, GCF, & LCM Review

Prime Factorization

100

Find the prime factorization of 16

16 = 2⁴

200

Find the prime factorization of 25

25 = 5²

300

Find the prime factorization of 54

54 = 2 x 3³

400

Find the prime factorization of 77

77 = 7 x 11

500

Find the prime factorization of 84

84 = 2² x 3 x 7

HCF listing factors

100

Find the HCF by listing factors

6, 15

3

200

Find the HCF by listing factors

27, 45

 9

300

Find the HCF by listing factors

30, 48

6

400

Find the HCF by listing factors

28, 48, 64

 4

500

Find the HCF by listing factors

42, 70, 84

14

HCF prime factorization

100

Find the HCF by the prime factorizations

20, 45

5

200

Find the HCF by the prime factorization

24, 90

6 = 2 x 3

300

Find the HCF by the prime factorization

52, 68

4 = 2²

400

Find the HCF by the prime factorization

32, 56, 96

8 = 2³

500

Find the HCF by the prime factorization

45, 75, 120

15 = 3 x 5

LCM listing multiples

100

Find the LCM by listing multiples

4, 6

The LCM of 4 and 6 is 12

200

Find the LCM by listing multiples

4, 14

The LCM of 4 and 14 is 28

300

Find the LCM by listing multiples

6, 20

The LCM of 6 and 20 is 60

400

Find the LCM by listing multiples 

15, 20

The LCM of 15 and 20 is 60

500

Find the LCM by listing multiples

12, 28

The LCM of 12 and 28 is 84

LCM prime factorization

100

Find the LCM by the prime factorization

16, 20

2x2x2x2x5 = 2⁴ x 5 = 80

200

Find the LCM by the prime factorization

6, 45

2x3x3x5 = 2 x 3² x 5 = 90

300

Find the LCM by the prime factorization

10, 12

2x2x3x5 = 2² x 3 x 5 =60

400

Find the LCM by the prime factorization

18, 27

2x3³ = 54

500

Find the LCM by the prime factorization

9, 10, 28

2² x 3² x 5 x 7 = 1,260