The GCD of given numbers is 2040.
Step 1 :
Divide $ 6120 $ by $ 2040 $ and get the remainder
The remainder is zero => GCD is the last divisor $ \color{blue}{ \boxed { 2040 }} $.
We can summarize an algorithm into a following table.
6120 | : | 2040 | = | 3 | remainder ( 0 ) |
GCD = 2040 |
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.