Least Common Multiple (LCM) of 20 and 125
The least common multiple (LCM) of 20 and 125 is 500.
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 125?
First, calculate the GCD of 20 and 125 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 125 = 0 remainder 20 |
| 2 | 125 ÷ 20 = 6 remainder 5 |
| 3 | 20 ÷ 5 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 39 and 26 | 78 |
| 116 and 178 | 10324 |
| 196 and 189 | 5292 |
| 51 and 86 | 4386 |
| 68 and 126 | 4284 |