Greatest Common Divisor (GCD) of 122 and 144
The greatest common divisor (GCD) of 122 and 144 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 122 and 144?
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 | 122 ÷ 144 = 0 remainder 122 |
| 2 | 144 ÷ 122 = 1 remainder 22 |
| 3 | 122 ÷ 22 = 5 remainder 12 |
| 4 | 22 ÷ 12 = 1 remainder 10 |
| 5 | 12 ÷ 10 = 1 remainder 2 |
| 6 | 10 ÷ 2 = 5 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 161 and 13 | 1 |
| 178 and 105 | 1 |
| 190 and 36 | 2 |
| 45 and 181 | 1 |
| 133 and 43 | 1 |