The GCD of given numbers is 1.
factors of 19 are : | 1 , 19 |
factors of 99 are : | 1 , 3 , 9 , 11 , 33 , 99 |
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.