Least Common Multiple (LCM) of 81 and 61
The least common multiple (LCM) of 81 and 61 is 4941.
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 81 and 61?
First, calculate the GCD of 81 and 61 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 61 = 1 remainder 20 |
| 2 | 61 ÷ 20 = 3 remainder 1 |
| 3 | 20 ÷ 1 = 20 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 48 and 50 | 1200 |
| 163 and 151 | 24613 |
| 173 and 31 | 5363 |
| 35 and 129 | 4515 |
| 89 and 47 | 4183 |