Greatest Common Divisor (GCD) of 153 and 83
The greatest common divisor (GCD) of 153 and 83 is 1.
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 153 and 83?
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 | 153 ÷ 83 = 1 remainder 70 |
| 2 | 83 ÷ 70 = 1 remainder 13 |
| 3 | 70 ÷ 13 = 5 remainder 5 |
| 4 | 13 ÷ 5 = 2 remainder 3 |
| 5 | 5 ÷ 3 = 1 remainder 2 |
| 6 | 3 ÷ 2 = 1 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 74 and 90 | 2 |
| 179 and 42 | 1 |
| 187 and 186 | 1 |
| 125 and 169 | 1 |
| 66 and 53 | 1 |