Find Greatest Common Divisor of 78 and 66, by listing out the factors.
Answer
The GCD of given numbers is 6.
Explanation
| factors of 78 are : | 1 , 2 , 3 , 6 , 13 , 26 , 39 , 78 |
| factors of 66 are : | 1 , 2 , 3 , 6 , 11 , 22 , 33 , 66 |
We see that the Greatest Common Factor = 6.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.
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