Greatest Common Divisor (GCD) of 130 and 168
The greatest common divisor (GCD) of 130 and 168 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 130 and 168?
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 | 130 ÷ 168 = 0 remainder 130 |
| 2 | 168 ÷ 130 = 1 remainder 38 |
| 3 | 130 ÷ 38 = 3 remainder 16 |
| 4 | 38 ÷ 16 = 2 remainder 6 |
| 5 | 16 ÷ 6 = 2 remainder 4 |
| 6 | 6 ÷ 4 = 1 remainder 2 |
| 7 | 4 ÷ 2 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 150 and 163 | 1 |
| 15 and 55 | 5 |
| 163 and 160 | 1 |
| 44 and 82 | 2 |
| 25 and 118 | 1 |