Greatest Common Divisor (GCD) of 163 and 198
The greatest common divisor (GCD) of 163 and 198 is 1.
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 163 and 198?
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 | 163 ÷ 198 = 0 remainder 163 |
| 2 | 198 ÷ 163 = 1 remainder 35 |
| 3 | 163 ÷ 35 = 4 remainder 23 |
| 4 | 35 ÷ 23 = 1 remainder 12 |
| 5 | 23 ÷ 12 = 1 remainder 11 |
| 6 | 12 ÷ 11 = 1 remainder 1 |
| 7 | 11 ÷ 1 = 11 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 121 and 49 | 1 |
| 18 and 158 | 2 |
| 17 and 142 | 1 |
| 182 and 52 | 26 |
| 138 and 175 | 1 |