Question

Find the gcf 15, 18, 30

Answer 1

the answer is three 15/3=5     18/3=6       30/3=10

Answer 2

gcf of 15, 18, 30 = 3

Explanation:

Greatest common factor: the positive integer that divides the given numbers with no remainder, that is, where the quotient is also a positive integer.

Factors of 15: 1, 3, 5, 15

1x15 = 15

3x5 = 15

Factors of 18: 1, 2, 3, 6, 9, 18

1x18 = 18

2x9 = 18

3x6 = 18

Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

1x30 = 30

2x15 = 30

3x10 = 30

5x6 = 30

gcf of 15, 18, 30 = 3, as seen in the list of factors of the three numbers given.

This is because 3 is the greatest positive integer that divides 15, 18 and 30 without any remaining or obtaining a positive integer quotient.

Hope this helps!