Least Common Multiple (LCM) of 20 and 195
The least common multiple (LCM) of 20 and 195 is 780.
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 195?
First, calculate the GCD of 20 and 195 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 195 = 0 remainder 20 |
| 2 | 195 ÷ 20 = 9 remainder 15 |
| 3 | 20 ÷ 15 = 1 remainder 5 |
| 4 | 15 ÷ 5 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 134 and 87 | 11658 |
| 64 and 129 | 8256 |
| 128 and 85 | 10880 |
| 74 and 90 | 3330 |
| 172 and 123 | 21156 |