Question
Find Greatest Common Divisor of 4740 and 1760, using repeated division.
Answer
The GCD of given numbers is 20.
Explanation
Step 1 : Place the numbers inside division bar:.
| 4740 | 1760 |
Step 2 : Divide numbers by 2.
| 2 | 4740 | 1760 |
| 2370 | 880 |
Step 3 : Divide numbers by 2.
| 2 | 4740 | 1760 |
| 2 | 2370 | 880 |
| 1185 | 440 |
Step 4 : Divide numbers by 5.
| 2 | 4740 | 1760 |
| 2 | 2370 | 880 |
| 5 | 1185 | 440 |
| 237 | 88 |
Step 5 : Number 237 and 88, cannot be divided any more. The GCD is:
$$ GCD = 2\cdot2\cdot5 = 20 $$This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.
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