Least Common Multiple (LCM) of 81 and 126
The least common multiple (LCM) of 81 and 126 is 1134.
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 126?
First, calculate the GCD of 81 and 126 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 126 = 0 remainder 81 |
| 2 | 126 ÷ 81 = 1 remainder 45 |
| 3 | 81 ÷ 45 = 1 remainder 36 |
| 4 | 45 ÷ 36 = 1 remainder 9 |
| 5 | 36 ÷ 9 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 182 and 175 | 4550 |
| 12 and 165 | 660 |
| 103 and 141 | 14523 |
| 39 and 16 | 624 |
| 57 and 78 | 1482 |