The GCD of given numbers is 16.
factors of 64 are : | 1 , 2 , 4 , 8 , 16 , 32 , 64 |
factors of 80 are : | 1 , 2 , 4 , 5 , 8 , 10 , 16 , 20 , 40 , 80 |
We see that the Greatest Common Factor = 16.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.