Least Common Multiple (LCM) of 20 and 50
The least common multiple (LCM) of 20 and 50 is 100.
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 50?
First, calculate the GCD of 20 and 50 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 50 = 0 remainder 20 |
| 2 | 50 ÷ 20 = 2 remainder 10 |
| 3 | 20 ÷ 10 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 88 and 38 | 1672 |
| 105 and 34 | 3570 |
| 197 and 95 | 18715 |
| 43 and 129 | 129 |
| 81 and 150 | 4050 |