Least Common Multiple (LCM) of 39 and 105
The least common multiple (LCM) of 39 and 105 is 1365.
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 39 and 105?
First, calculate the GCD of 39 and 105 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 39 ÷ 105 = 0 remainder 39 |
| 2 | 105 ÷ 39 = 2 remainder 27 |
| 3 | 39 ÷ 27 = 1 remainder 12 |
| 4 | 27 ÷ 12 = 2 remainder 3 |
| 5 | 12 ÷ 3 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 123 and 48 | 1968 |
| 78 and 87 | 2262 |
| 118 and 54 | 3186 |
| 87 and 68 | 5916 |
| 149 and 34 | 5066 |