Greatest Common Divisor (GCD) of 191 and 100
The greatest common divisor (GCD) of 191 and 100 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 191 and 100?
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 | 191 ÷ 100 = 1 remainder 91 |
| 2 | 100 ÷ 91 = 1 remainder 9 |
| 3 | 91 ÷ 9 = 10 remainder 1 |
| 4 | 9 ÷ 1 = 9 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 161 and 12 | 1 |
| 127 and 66 | 1 |
| 55 and 172 | 1 |
| 199 and 128 | 1 |
| 63 and 28 | 7 |