Least Common Multiple (LCM) of 27 and 123
The least common multiple (LCM) of 27 and 123 is 1107.
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 27 and 123?
First, calculate the GCD of 27 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 27 ÷ 123 = 0 remainder 27 |
| 2 | 123 ÷ 27 = 4 remainder 15 |
| 3 | 27 ÷ 15 = 1 remainder 12 |
| 4 | 15 ÷ 12 = 1 remainder 3 |
| 5 | 12 ÷ 3 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 68 and 71 | 4828 |
| 78 and 69 | 1794 |
| 148 and 68 | 2516 |
| 97 and 169 | 16393 |
| 129 and 154 | 19866 |