The GCD of given numbers is 7.
Step 1 :
Divide $ 154 $ by $ 7 $ and get the remainder
The remainder is zero => GCD is the last divisor $ \color{blue}{ \boxed { 7 }} $.
We can summarize an algorithm into a following table.
154 | : | 7 | = | 22 | remainder ( 0 ) |
GCD = 7 |
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.