Least Common Multiple (LCM) of 51 and 123
The least common multiple (LCM) of 51 and 123 is 2091.
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 51 and 123?
First, calculate the GCD of 51 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 51 ÷ 123 = 0 remainder 51 |
| 2 | 123 ÷ 51 = 2 remainder 21 |
| 3 | 51 ÷ 21 = 2 remainder 9 |
| 4 | 21 ÷ 9 = 2 remainder 3 |
| 5 | 9 ÷ 3 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 128 and 29 | 3712 |
| 87 and 41 | 3567 |
| 181 and 185 | 33485 |
| 79 and 66 | 5214 |
| 128 and 39 | 4992 |