Least Common Multiple (LCM) of 64 and 81
The least common multiple (LCM) of 64 and 81 is 5184.
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 64 and 81?
First, calculate the GCD of 64 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 64 ÷ 81 = 0 remainder 64 |
| 2 | 81 ÷ 64 = 1 remainder 17 |
| 3 | 64 ÷ 17 = 3 remainder 13 |
| 4 | 17 ÷ 13 = 1 remainder 4 |
| 5 | 13 ÷ 4 = 3 remainder 1 |
| 6 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 45 and 81 | 405 |
| 35 and 75 | 525 |
| 139 and 68 | 9452 |
| 161 and 21 | 483 |
| 29 and 184 | 5336 |