Least Common Multiple (LCM) of 81 and 54
The least common multiple (LCM) of 81 and 54 is 162.
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 54?
First, calculate the GCD of 81 and 54 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 54 = 1 remainder 27 |
| 2 | 54 ÷ 27 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 38 and 47 | 1786 |
| 144 and 94 | 6768 |
| 97 and 176 | 17072 |
| 189 and 116 | 21924 |
| 42 and 195 | 2730 |