Least Common Multiple (LCM) of 129 and 81
The least common multiple (LCM) of 129 and 81 is 3483.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 129 and 81?
First, calculate the GCD of 129 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 129 ÷ 81 = 1 remainder 48 |
| 2 | 81 ÷ 48 = 1 remainder 33 |
| 3 | 48 ÷ 33 = 1 remainder 15 |
| 4 | 33 ÷ 15 = 2 remainder 3 |
| 5 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 25 and 13 | 325 |
| 135 and 199 | 26865 |
| 59 and 63 | 3717 |
| 20 and 103 | 2060 |
| 11 and 72 | 792 |