Least Common Multiple (LCM) of 138 and 55
The least common multiple (LCM) of 138 and 55 is 7590.
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 55?
First, calculate the GCD of 138 and 55 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 55 = 2 remainder 28 |
| 2 | 55 ÷ 28 = 1 remainder 27 |
| 3 | 28 ÷ 27 = 1 remainder 1 |
| 4 | 27 ÷ 1 = 27 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 68 and 84 | 1428 |
| 18 and 71 | 1278 |
| 191 and 39 | 7449 |
| 89 and 79 | 7031 |
| 104 and 148 | 3848 |