Greatest Common Divisor (GCD) of 128 and 162
The greatest common divisor (GCD) of 128 and 162 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 128 and 162?
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 | 128 ÷ 162 = 0 remainder 128 |
| 2 | 162 ÷ 128 = 1 remainder 34 |
| 3 | 128 ÷ 34 = 3 remainder 26 |
| 4 | 34 ÷ 26 = 1 remainder 8 |
| 5 | 26 ÷ 8 = 3 remainder 2 |
| 6 | 8 ÷ 2 = 4 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 100 and 147 | 1 |
| 74 and 122 | 2 |
| 133 and 140 | 7 |
| 184 and 51 | 1 |
| 131 and 50 | 1 |