Greatest Common Divisor (GCD) of 65 and 104
The greatest common divisor (GCD) of 65 and 104 is 13.
What is the Greatest Common Divisor (GCD)?
The GCD of two integers is the largest positive integer that divides both numbers without leaving a remainder. It is useful in simplifying fractions, finding common factors, and in number theory.
How to Calculate the GCD of 65 and 104?
We use the Euclidean algorithm, which involves the following steps:
- Divide the larger number by the smaller number.
- Replace the larger number with the smaller number and the smaller number with the remainder from the division.
- Repeat this process until the remainder is zero.
- The non-zero remainder just before zero is the GCD.
Step-by-Step Euclidean Algorithm
| Step | Calculation |
|---|---|
| 1 | 65 ÷ 104 = 0 remainder 65 |
| 2 | 104 ÷ 65 = 1 remainder 39 |
| 3 | 65 ÷ 39 = 1 remainder 26 |
| 4 | 39 ÷ 26 = 1 remainder 13 |
| 5 | 26 ÷ 13 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 132 and 186 | 6 |
| 148 and 43 | 1 |
| 90 and 120 | 30 |
| 102 and 78 | 6 |
| 169 and 130 | 13 |