Greatest Common Divisor (GCD) of 140 and 80
The greatest common divisor (GCD) of 140 and 80 is 20.
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 140 and 80?
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 | 140 ÷ 80 = 1 remainder 60 |
| 2 | 80 ÷ 60 = 1 remainder 20 |
| 3 | 60 ÷ 20 = 3 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 75 and 114 | 3 |
| 29 and 177 | 1 |
| 40 and 39 | 1 |
| 47 and 35 | 1 |
| 199 and 152 | 1 |