The GCD of given numbers is 5.
factors of 25 are : | 1 , 5 , 25 |
factors of 45 are : | 1 , 3 , 5 , 9 , 15 , 45 |
factors of 55 are : | 1 , 5 , 11 , 55 |
We see that the Greatest Common Factor = 5.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.