The GCD of given numbers is 31.
Step 1 :
Divide $ 31 $ by $ 31 $ and get the remainder
The remainder is zero => GCD is the last divisor $ \color{blue}{ \boxed { 31 }} $.
We can summarize an algorithm into a following table.
31 | : | 31 | = | 1 | remainder ( 0 ) |
GCD = 31 |
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.