Greatest Common Divisor (GCD) of 85 and 152
The greatest common divisor (GCD) of 85 and 152 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 85 and 152?
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 | 85 ÷ 152 = 0 remainder 85 |
| 2 | 152 ÷ 85 = 1 remainder 67 |
| 3 | 85 ÷ 67 = 1 remainder 18 |
| 4 | 67 ÷ 18 = 3 remainder 13 |
| 5 | 18 ÷ 13 = 1 remainder 5 |
| 6 | 13 ÷ 5 = 2 remainder 3 |
| 7 | 5 ÷ 3 = 1 remainder 2 |
| 8 | 3 ÷ 2 = 1 remainder 1 |
| 9 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 140 and 79 | 1 |
| 93 and 120 | 3 |
| 100 and 119 | 1 |
| 109 and 61 | 1 |
| 148 and 17 | 1 |