Greatest Common Divisor (GCD) of 151 and 51
The greatest common divisor (GCD) of 151 and 51 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 151 and 51?
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 | 151 ÷ 51 = 2 remainder 49 |
| 2 | 51 ÷ 49 = 1 remainder 2 |
| 3 | 49 ÷ 2 = 24 remainder 1 |
| 4 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 123 and 178 | 1 |
| 131 and 148 | 1 |
| 195 and 165 | 15 |
| 110 and 80 | 10 |
| 25 and 191 | 1 |