1. GCF = 3

The factors of 6 are: 1, 2, 3, 6

, 6The factors of 15 are: 1, 3, 5, 15

, 5, 15The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24

, 4, 6, 8, 12, 24Then the greatest common factor is 3

2. GCF = 9

The factors of 18 are: 1, 2, 3, 6, 9, 18

The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36

The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36The factors of 45 are: 1, 3, 5, 9, 15, 45

The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36The factors of 45 are: 1, 3, 5, 9, 15, 45Then the greatest common factor is 9.

3. GCF = 15

The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30

, 30The factors of 45 are: 1, 3, 5, 9, 15, 45

, 45The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

, 18, 30, 45, 90Then the greatest common factor is 15.

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Answer:

1. The GCF of 6, 15, and 24 is 3.

6= 1,2,3,6

15= 1,3,5,15

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

=3

2. The GCF of 18, 36, and 45 is 9.

18= 1,2,3,6,9,18

36= 1,2,3,4,6,9,12,18,39

45= 1,3,5,9,15,45

=1,2,3,9

3. The GCF of 30, 45, and 90 is 15.

30= 1,2,3,5,6,10,15,30

45= 1,3,5,9,15,45

90= 1,2,3,5,6,9,10,15,18,30,45,90

Step-by-step explanation:

I hope it help you!

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