Greatest Common Divisor (GCD) of 138 and 50
The greatest common divisor (GCD) of 138 and 50 is 2.
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 138 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 | 138 ÷ 50 = 2 remainder 38 |
| 2 | 50 ÷ 38 = 1 remainder 12 |
| 3 | 38 ÷ 12 = 3 remainder 2 |
| 4 | 12 ÷ 2 = 6 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 63 and 111 | 3 |
| 104 and 73 | 1 |
| 166 and 132 | 2 |
| 176 and 142 | 2 |
| 45 and 155 | 5 |