The GCD of given numbers is 8.
factors of 56 are : | 1 , 2 , 4 , 7 , 8 , 14 , 28 , 56 |
factors of 72 are : | 1 , 2 , 3 , 4 , 6 , 8 , 9 , 12 , 18 , 24 , 36 , 72 |
We see that the Greatest Common Factor = 8.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.