Least Common Multiple (LCM) of 81 and 77
The least common multiple (LCM) of 81 and 77 is 6237.
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 77?
First, calculate the GCD of 81 and 77 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 77 = 1 remainder 4 |
| 2 | 77 ÷ 4 = 19 remainder 1 |
| 3 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 69 and 95 | 6555 |
| 141 and 182 | 25662 |
| 43 and 21 | 903 |
| 28 and 65 | 1820 |
| 171 and 156 | 8892 |