What is the greatest common factor of 30 and 75?

Answer 1

The GCF of 30 and 75 is 15

In order to find the HCF of 30 and 75 you must first express them as the product of their prime factors:

30 = 2x3x5

75 = 3x5x5

The next step is to identify any common factors. In this case both numbers have a 3 and a 5 as factors. Multiply these together to find the HCF:

3x5 = 15

Thus the greatest common factor of 30 and 75 is 15.

Answer 2

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

The factors of 75 are: 1, 3, 5, 15, 25, 75.

The common factors are: 1, 3, 5, 15.

• The Greatest Common Factor (GCF) is:15

Answer 3

15 is.

Answer 4

15.