Greatest Common Divisor (GCD) of 147 and 93
The greatest common divisor (GCD) of 147 and 93 is 3.
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 147 and 93?
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 | 147 ÷ 93 = 1 remainder 54 |
| 2 | 93 ÷ 54 = 1 remainder 39 |
| 3 | 54 ÷ 39 = 1 remainder 15 |
| 4 | 39 ÷ 15 = 2 remainder 9 |
| 5 | 15 ÷ 9 = 1 remainder 6 |
| 6 | 9 ÷ 6 = 1 remainder 3 |
| 7 | 6 ÷ 3 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 31 and 123 | 1 |
| 28 and 11 | 1 |
| 195 and 140 | 5 |
| 148 and 107 | 1 |
| 105 and 189 | 21 |