The GCD of given numbers is 17.
factors of 102 are : | 1 , 2 , 3 , 6 , 17 , 34 , 51 , 102 |
factors of 170 are : | 1 , 2 , 5 , 10 , 17 , 34 , 85 , 170 |
factors of 255 are : | 1 , 3 , 5 , 15 , 17 , 51 , 85 , 255 |
We see that the Greatest Common Factor = 17.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.