Prime Factorization, GCF, & LCM Review

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Prime Factorization

HCF listing factors

HCF prime factorization

LCM listing multiples

LCM prime factorization

100

Find the prime factorization of 16

16 = 2⁴

100

Find the HCF by listing factors

6, 15

3

100

Find the HCF by the prime factorizations

20, 45

5

100

Find the LCM by listing multiples

4, 6

The LCM of 4 and 6 is 12

100

Find the LCM by the prime factorization

16, 20

2x2x2x2x5 = 2⁴ x 5 = 80

200

Find the prime factorization of 25

25 = 5²

200

Find the HCF by listing factors

27, 45

9

200

Find the HCF by the prime factorization

24, 90

6 = 2 x 3

200

Find the LCM by listing multiples

4, 14

The LCM of 4 and 14 is 28

200

Find the LCM by the prime factorization

6, 45

2x3x3x5 = 2 x 3² x 5 = 90

300

Find the prime factorization of 54

54 = 2 x 3³

300

Find the HCF by listing factors

30, 48

6

300

Find the HCF by the prime factorization

52, 68

4 = 2²

300

Find the LCM by listing multiples

6, 20

The LCM of 6 and 20 is 60

300

Find the LCM by the prime factorization

10, 12

2x2x3x5 = 2² x 3 x 5 =60

400

Find the prime factorization of 77

77 = 7 x 11

400

Find the HCF by listing factors

28, 48, 64

4

400

Find the HCF by the prime factorization

32, 56, 96

8 = 2³

400

Find the LCM by listing multiples

15, 20

The LCM of 15 and 20 is 60

400

Find the LCM by the prime factorization

18, 27

2x3³ = 54

500

Find the prime factorization of 84

84 = 2² x 3 x 7

500

Find the HCF by listing factors

42, 70, 84

14

500

Find the HCF by the prime factorization

45, 75, 120

15 = 3 x 5

500

Find the LCM by listing multiples

12, 28

The LCM of 12 and 28 is 84

500

Find the LCM by the prime factorization

9, 10, 28

2² x 3² x 5 x 7 = 1,260