Least Common Multiple (LCM) of 155 and 138
The least common multiple (LCM) of 155 and 138 is 21390.
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 155 and 138?
First, calculate the GCD of 155 and 138 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 155 ÷ 138 = 1 remainder 17 |
| 2 | 138 ÷ 17 = 8 remainder 2 |
| 3 | 17 ÷ 2 = 8 remainder 1 |
| 4 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 51 and 26 | 1326 |
| 102 and 72 | 1224 |
| 17 and 104 | 1768 |
| 70 and 200 | 1400 |
| 129 and 129 | 129 |