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