Least Common Multiple (LCM) of 105 and 123
The least common multiple (LCM) of 105 and 123 is 4305.
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 105 and 123?
First, calculate the GCD of 105 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 105 ÷ 123 = 0 remainder 105 |
| 2 | 123 ÷ 105 = 1 remainder 18 |
| 3 | 105 ÷ 18 = 5 remainder 15 |
| 4 | 18 ÷ 15 = 1 remainder 3 |
| 5 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 131 and 82 | 10742 |
| 104 and 111 | 11544 |
| 178 and 53 | 9434 |
| 40 and 11 | 440 |
| 61 and 74 | 4514 |