The GCD of given numbers is 2.
Step 1 :
Divide $ 8 $ by $ 6 $ and get the remainder
The remainder is positive ($ 2 > 0 $), so we will continue with division.
Step 2 :
Divide $ 6 $ by $ \color{blue}{ 2 } $ and get the remainder
The remainder is zero => GCD is the last divisor $ \color{blue}{ \boxed { 2 }} $.
We can summarize an algorithm into a following table.
8 | : | 6 | = | 1 | remainder ( 2 ) | ||
6 | : | 2 | = | 3 | remainder ( 0 ) | ||
GCD = 2 |
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.