Greatest Common Divisor (GCD) of 163 and 189
The greatest common divisor (GCD) of 163 and 189 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 189?
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 ÷ 189 = 0 remainder 163 |
| 2 | 189 ÷ 163 = 1 remainder 26 |
| 3 | 163 ÷ 26 = 6 remainder 7 |
| 4 | 26 ÷ 7 = 3 remainder 5 |
| 5 | 7 ÷ 5 = 1 remainder 2 |
| 6 | 5 ÷ 2 = 2 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 113 and 94 | 1 |
| 102 and 28 | 2 |
| 118 and 10 | 2 |
| 152 and 184 | 8 |
| 114 and 85 | 1 |