Least Common Multiple (LCM) of 91 and 81
The least common multiple (LCM) of 91 and 81 is 7371.
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 91 and 81?
First, calculate the GCD of 91 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 91 ÷ 81 = 1 remainder 10 |
| 2 | 81 ÷ 10 = 8 remainder 1 |
| 3 | 10 ÷ 1 = 10 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 79 and 13 | 1027 |
| 36 and 164 | 1476 |
| 82 and 68 | 2788 |
| 160 and 184 | 3680 |
| 28 and 150 | 2100 |