Least Common Multiple (LCM) of 20 and 129
The least common multiple (LCM) of 20 and 129 is 2580.
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 20 and 129?
First, calculate the GCD of 20 and 129 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 129 = 0 remainder 20 |
| 2 | 129 ÷ 20 = 6 remainder 9 |
| 3 | 20 ÷ 9 = 2 remainder 2 |
| 4 | 9 ÷ 2 = 4 remainder 1 |
| 5 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 165 and 50 | 1650 |
| 74 and 36 | 1332 |
| 141 and 28 | 3948 |
| 185 and 125 | 4625 |
| 70 and 33 | 2310 |