Least Common Multiple (LCM) of 81 and 169
The least common multiple (LCM) of 81 and 169 is 13689.
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 169?
First, calculate the GCD of 81 and 169 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 169 = 0 remainder 81 |
| 2 | 169 ÷ 81 = 2 remainder 7 |
| 3 | 81 ÷ 7 = 11 remainder 4 |
| 4 | 7 ÷ 4 = 1 remainder 3 |
| 5 | 4 ÷ 3 = 1 remainder 1 |
| 6 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 48 and 110 | 2640 |
| 57 and 194 | 11058 |
| 131 and 132 | 17292 |
| 10 and 16 | 80 |
| 90 and 52 | 2340 |