Greatest Common Divisor (GCD) of 145 and 197
The greatest common divisor (GCD) of 145 and 197 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 145 and 197?
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 | 145 ÷ 197 = 0 remainder 145 |
| 2 | 197 ÷ 145 = 1 remainder 52 |
| 3 | 145 ÷ 52 = 2 remainder 41 |
| 4 | 52 ÷ 41 = 1 remainder 11 |
| 5 | 41 ÷ 11 = 3 remainder 8 |
| 6 | 11 ÷ 8 = 1 remainder 3 |
| 7 | 8 ÷ 3 = 2 remainder 2 |
| 8 | 3 ÷ 2 = 1 remainder 1 |
| 9 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 140 and 41 | 1 |
| 183 and 60 | 3 |
| 174 and 154 | 2 |
| 181 and 34 | 1 |
| 86 and 107 | 1 |