Least Common Multiple (LCM) of 123 and 129
The least common multiple (LCM) of 123 and 129 is 5289.
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 123 and 129?
First, calculate the GCD of 123 and 129 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 123 ÷ 129 = 0 remainder 123 |
| 2 | 129 ÷ 123 = 1 remainder 6 |
| 3 | 123 ÷ 6 = 20 remainder 3 |
| 4 | 6 ÷ 3 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 142 and 138 | 9798 |
| 178 and 86 | 7654 |
| 74 and 175 | 12950 |
| 30 and 24 | 120 |
| 42 and 19 | 798 |