Find Greatest Common Divisor of 32 and 72, using repeated division.
Answer
The GCD of given numbers is 8.
Explanation
Step 1 : Place the numbers inside division bar:.
| 32 | 72 |
Step 2 : Divide numbers by 2.
| 2 | 32 | 72 |
| 16 | 36 |
Step 3 : Divide numbers by 2.
| 2 | 32 | 72 |
| 2 | 16 | 36 |
| 8 | 18 |
Step 4 : Divide numbers by 2.
| 2 | 32 | 72 |
| 2 | 16 | 36 |
| 2 | 8 | 18 |
| 4 | 9 |
Step 5 : Number 4 and 9, cannot be divided any more. The GCD is:
$$ GCD = 2\cdot2\cdot2 = 8 $$This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.
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