Question
Find Greatest Common Divisor of 22 and 77, using Euclidean algorithm.
Answer
The GCD of given numbers is 11.
Explanation
Step 1 :
Divide by and get the remainder
The remainder is positive (), so we will continue with division.
Step 2 :
Divide by and get the remainder
The remainder is zero => GCD is the last divisor .
We can summarize an algorithm into a following table.
| 77 | : | 22 | = | 3 | remainder ( 11 ) | ||
| 22 | : | 11 | = | 2 | remainder ( 0 ) | ||
| GCD = 11 | |||||||
This solution can be visualized using a Venn diagram.
0,0
22
77
11
2
7
The GCD equals the product of the numbers at the intersection.
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