The GCD of given numbers is 13.
| factors of 429 are : | 1 , 3 , 11 , 13 , 33 , 39 , 143 , 429 |
| factors of 299 are : | 1 , 13 , 23 , 299 |
We see that the Greatest Common Factor = 13.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.