Least Common Multiple (LCM) of 27 and 81
The least common multiple (LCM) of 27 and 81 is 81.
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 27 and 81?
First, calculate the GCD of 27 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 27 ÷ 81 = 0 remainder 27 |
| 2 | 81 ÷ 27 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 200 and 79 | 15800 |
| 18 and 190 | 1710 |
| 188 and 123 | 23124 |
| 196 and 192 | 9408 |
| 143 and 22 | 286 |