Least Common Multiple (LCM) of 138 and 54
The least common multiple (LCM) of 138 and 54 is 1242.
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 138 and 54?
First, calculate the GCD of 138 and 54 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 54 = 2 remainder 30 |
| 2 | 54 ÷ 30 = 1 remainder 24 |
| 3 | 30 ÷ 24 = 1 remainder 6 |
| 4 | 24 ÷ 6 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 173 and 84 | 14532 |
| 90 and 20 | 180 |
| 140 and 39 | 5460 |
| 10 and 133 | 1330 |
| 93 and 22 | 2046 |