Least Common Multiple (LCM) of 80 and 81
The least common multiple (LCM) of 80 and 81 is 6480.
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 80 and 81?
First, calculate the GCD of 80 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 80 ÷ 81 = 0 remainder 80 |
| 2 | 81 ÷ 80 = 1 remainder 1 |
| 3 | 80 ÷ 1 = 80 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 123 and 192 | 7872 |
| 191 and 140 | 26740 |
| 200 and 104 | 2600 |
| 200 and 67 | 13400 |
| 88 and 142 | 6248 |