Greatest Common Divisor (GCD) of 195 and 117
The greatest common divisor (GCD) of 195 and 117 is 39.
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 195 and 117?
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 | 195 ÷ 117 = 1 remainder 78 |
| 2 | 117 ÷ 78 = 1 remainder 39 |
| 3 | 78 ÷ 39 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 147 and 154 | 7 |
| 191 and 174 | 1 |
| 134 and 154 | 2 |
| 63 and 58 | 1 |
| 77 and 116 | 1 |