Least Common Multiple (LCM) of 22 and 81
The least common multiple (LCM) of 22 and 81 is 1782.
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 22 and 81?
First, calculate the GCD of 22 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 22 ÷ 81 = 0 remainder 22 |
| 2 | 81 ÷ 22 = 3 remainder 15 |
| 3 | 22 ÷ 15 = 1 remainder 7 |
| 4 | 15 ÷ 7 = 2 remainder 1 |
| 5 | 7 ÷ 1 = 7 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 75 and 162 | 4050 |
| 147 and 95 | 13965 |
| 167 and 35 | 5845 |
| 161 and 176 | 28336 |
| 125 and 66 | 8250 |