Question
Find Greatest Common Divisor of 6, 9, 12, 15 and 18, by listing out the factors.
Answer
The GCD of given numbers is 3.
Explanation
| factors of 6 are : | 1 , 2 , 3 , 6 |
| factors of 9 are : | 1 , 3 , 9 |
| factors of 12 are : | 1 , 2 , 3 , 4 , 6 , 12 |
| factors of 15 are : | 1 , 3 , 5 , 15 |
| factors of 18 are : | 1 , 2 , 3 , 6 , 9 , 18 |
We see that the Greatest Common Factor = 3.
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