Least Common Multiple (LCM) of 81 and 129
The least common multiple (LCM) of 81 and 129 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 81 and 129?
First, calculate the GCD of 81 and 129 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 129 = 0 remainder 81 |
| 2 | 129 ÷ 81 = 1 remainder 48 |
| 3 | 81 ÷ 48 = 1 remainder 33 |
| 4 | 48 ÷ 33 = 1 remainder 15 |
| 5 | 33 ÷ 15 = 2 remainder 3 |
| 6 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 64 and 18 | 576 |
| 170 and 19 | 3230 |
| 130 and 142 | 9230 |
| 193 and 186 | 35898 |
| 55 and 111 | 6105 |