Least Common Multiple (LCM) of 81 and 122
The least common multiple (LCM) of 81 and 122 is 9882.
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 122?
First, calculate the GCD of 81 and 122 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 122 = 0 remainder 81 |
| 2 | 122 ÷ 81 = 1 remainder 41 |
| 3 | 81 ÷ 41 = 1 remainder 40 |
| 4 | 41 ÷ 40 = 1 remainder 1 |
| 5 | 40 ÷ 1 = 40 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 157 and 17 | 2669 |
| 154 and 77 | 154 |
| 65 and 52 | 260 |
| 117 and 12 | 468 |
| 138 and 126 | 2898 |