The GCD of given numbers is 3.
Step 1 : Place the numbers inside division bar:.
| 105 | 816 |
Step 2 : Divide numbers by 3.
| 3 | 105 | 816 |
| 35 | 272 |
Step 3 : Number 35 and 272, cannot be divided any more. The GCD is:
$$ GCD = 3 $$This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.