Least Common Multiple (LCM) of 81 and 24
The least common multiple (LCM) of 81 and 24 is 648.
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 24?
First, calculate the GCD of 81 and 24 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 24 = 3 remainder 9 |
| 2 | 24 ÷ 9 = 2 remainder 6 |
| 3 | 9 ÷ 6 = 1 remainder 3 |
| 4 | 6 ÷ 3 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 68 and 183 | 12444 |
| 13 and 24 | 312 |
| 18 and 197 | 3546 |
| 150 and 191 | 28650 |
| 97 and 55 | 5335 |