Greatest Common Divisor (GCD) of 86 and 145
The greatest common divisor (GCD) of 86 and 145 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 86 and 145?
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 | 86 ÷ 145 = 0 remainder 86 |
| 2 | 145 ÷ 86 = 1 remainder 59 |
| 3 | 86 ÷ 59 = 1 remainder 27 |
| 4 | 59 ÷ 27 = 2 remainder 5 |
| 5 | 27 ÷ 5 = 5 remainder 2 |
| 6 | 5 ÷ 2 = 2 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 97 and 197 | 1 |
| 90 and 191 | 1 |
| 113 and 171 | 1 |
| 167 and 16 | 1 |
| 18 and 92 | 2 |