What are the common factors of 40 and 15?

Answer 1

One way to determine the common factors 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 40 are 1, 2, 4, 5, 8, 10, 20, and 40.

The common factors are 1 and 5.

The greatest common factor is 5.

Answer 2

The factors of 40 are 1,2,4,5,8,10,20 and 40.

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

So the factors common to both number are 1 and 5

Answer 3

1,5

Answer 4

5