Least Common Multiple (LCM) of 18 and 54
The least common multiple (LCM) of 18 and 54 is 54.
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 18 and 54?
First, calculate the GCD of 18 and 54 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 18 ÷ 54 = 0 remainder 18 |
| 2 | 54 ÷ 18 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 123 and 43 | 5289 |
| 60 and 109 | 6540 |
| 19 and 173 | 3287 |
| 65 and 43 | 2795 |
| 58 and 123 | 7134 |