Greatest Common Divisor (GCD) of 91 and 158
The greatest common divisor (GCD) of 91 and 158 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 91 and 158?
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 | 91 ÷ 158 = 0 remainder 91 |
| 2 | 158 ÷ 91 = 1 remainder 67 |
| 3 | 91 ÷ 67 = 1 remainder 24 |
| 4 | 67 ÷ 24 = 2 remainder 19 |
| 5 | 24 ÷ 19 = 1 remainder 5 |
| 6 | 19 ÷ 5 = 3 remainder 4 |
| 7 | 5 ÷ 4 = 1 remainder 1 |
| 8 | 4 ÷ 1 = 4 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 150 and 94 | 2 |
| 110 and 106 | 2 |
| 18 and 165 | 3 |
| 185 and 101 | 1 |
| 200 and 70 | 10 |