The GCD of given numbers is 16.
factors of 80 are : | 1 , 2 , 4 , 5 , 8 , 10 , 16 , 20 , 40 , 80 |
factors of 144 are : | 1 , 2 , 3 , 4 , 6 , 8 , 9 , 12 , 16 , 18 , 24 , 36 , 48 , 72 , 144 |
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.