Least Common Multiple (LCM) of 81 and 121
The least common multiple (LCM) of 81 and 121 is 9801.
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 121?
First, calculate the GCD of 81 and 121 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 121 = 0 remainder 81 |
| 2 | 121 ÷ 81 = 1 remainder 40 |
| 3 | 81 ÷ 40 = 2 remainder 1 |
| 4 | 40 ÷ 1 = 40 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 132 and 20 | 660 |
| 120 and 168 | 840 |
| 90 and 13 | 1170 |
| 119 and 167 | 19873 |
| 157 and 19 | 2983 |