Least Common Multiple (LCM) of 81 and 64
The least common multiple (LCM) of 81 and 64 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 81 and 64?
First, calculate the GCD of 81 and 64 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 64 = 1 remainder 17 |
| 2 | 64 ÷ 17 = 3 remainder 13 |
| 3 | 17 ÷ 13 = 1 remainder 4 |
| 4 | 13 ÷ 4 = 3 remainder 1 |
| 5 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 97 and 135 | 13095 |
| 127 and 17 | 2159 |
| 175 and 110 | 3850 |
| 32 and 30 | 480 |
| 57 and 194 | 11058 |