Least Common Multiple (LCM) of 81 and 111
The least common multiple (LCM) of 81 and 111 is 2997.
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 111?
First, calculate the GCD of 81 and 111 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 111 = 0 remainder 81 |
| 2 | 111 ÷ 81 = 1 remainder 30 |
| 3 | 81 ÷ 30 = 2 remainder 21 |
| 4 | 30 ÷ 21 = 1 remainder 9 |
| 5 | 21 ÷ 9 = 2 remainder 3 |
| 6 | 9 ÷ 3 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 56 and 97 | 5432 |
| 42 and 50 | 1050 |
| 148 and 90 | 6660 |
| 27 and 159 | 1431 |
| 108 and 113 | 12204 |