What is the greatest common factor of 15 30 and 60?

Answer 1

gcf of 15 30 and 60 is 15.

Answer 2

15

Answer 3

15 is a factor of 30 and 60. Since 15 is also the largest possible factor of itself, the greatest common factor is 15.

Another way to determine the greatest common factor is to find all the factors of the numbers and compare them.

The factors of 15 are 1, 3, 5, and 15.

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

The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

The common factors are 1, 3, 5, and 15. Therefore, 15 is the greatest common factor.

The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.

The prime factors of 15 are 3 and 5.

The prime factors of 30 are 2, 3, and 5.

The prime factors of 60 are 2, 2, 3, and 5.

The prime factors in common are 3 and 5, so the greatest common factor is 3 x 5 = 15.

Answer 4

3,5,10