Greatest Common Divisor (GCD) of 90 and 50
The greatest common divisor (GCD) of 90 and 50 is 10.
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 90 and 50?
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 | 90 ÷ 50 = 1 remainder 40 |
| 2 | 50 ÷ 40 = 1 remainder 10 |
| 3 | 40 ÷ 10 = 4 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 185 and 173 | 1 |
| 162 and 69 | 3 |
| 103 and 180 | 1 |
| 114 and 107 | 1 |
| 20 and 172 | 4 |