Greatest Common Divisor (GCD) of 156 and 89
The greatest common divisor (GCD) of 156 and 89 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 156 and 89?
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 | 156 ÷ 89 = 1 remainder 67 |
| 2 | 89 ÷ 67 = 1 remainder 22 |
| 3 | 67 ÷ 22 = 3 remainder 1 |
| 4 | 22 ÷ 1 = 22 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 115 and 171 | 1 |
| 126 and 177 | 3 |
| 111 and 34 | 1 |
| 172 and 68 | 4 |
| 27 and 29 | 1 |