Least Common Multiple (LCM) of 55 and 138
The least common multiple (LCM) of 55 and 138 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 55 and 138?
First, calculate the GCD of 55 and 138 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 55 ÷ 138 = 0 remainder 55 |
| 2 | 138 ÷ 55 = 2 remainder 28 |
| 3 | 55 ÷ 28 = 1 remainder 27 |
| 4 | 28 ÷ 27 = 1 remainder 1 |
| 5 | 27 ÷ 1 = 27 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 121 and 37 | 4477 |
| 66 and 197 | 13002 |
| 189 and 200 | 37800 |
| 138 and 126 | 2898 |
| 174 and 103 | 17922 |