Greatest Common Divisor (GCD) of 43 and 86
The greatest common divisor (GCD) of 43 and 86 is 43.
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 43 and 86?
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 | 43 ÷ 86 = 0 remainder 43 |
| 2 | 86 ÷ 43 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 81 and 161 | 1 |
| 198 and 90 | 18 |
| 150 and 149 | 1 |
| 130 and 30 | 10 |
| 96 and 97 | 1 |