Question

Find the greatest common factor of 615 and 570.

Answer 1

Given the numbers:

`615\text{ and 570}`

Let's find their greatest common factor:

Step 1: Let's determine the factors of the numbers.

a.) 570

The factors of 570 are: 1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 57, 95, 114, 190, 285, 570

b.) 615

The factors of 615 are: 1, 3, 5, 15, 41, 123, 205, 615

Their common factors are: 1, 3, 5, 15

But the greatest among all factors is 15.

Therefore, their greatest common factor (GCF) is 15.