Least Common Multiple (LCM) of 81 and 79
The least common multiple (LCM) of 81 and 79 is 6399.
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 79?
First, calculate the GCD of 81 and 79 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 79 = 1 remainder 2 |
| 2 | 79 ÷ 2 = 39 remainder 1 |
| 3 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 135 and 108 | 540 |
| 102 and 129 | 4386 |
| 71 and 125 | 8875 |
| 126 and 161 | 2898 |
| 111 and 29 | 3219 |