The GCD of given numbers is 1.
factors of 12 are : | 1 , 2 , 3 , 4 , 6 , 12 |
factors of 75 are : | 1 , 3 , 5 , 15 , 25 , 75 |
factors of 130 are : | 1 , 2 , 5 , 10 , 13 , 26 , 65 , 130 |
We see that the Greatest Common Factor = 1.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.