Least Common Multiple (LCM) of 81 and 162
The least common multiple (LCM) of 81 and 162 is 162.
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 162?
First, calculate the GCD of 81 and 162 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 162 = 0 remainder 81 |
| 2 | 162 ÷ 81 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 197 and 85 | 16745 |
| 131 and 89 | 11659 |
| 108 and 89 | 9612 |
| 42 and 18 | 126 |
| 172 and 148 | 6364 |