Least Common Multiple (LCM) of 78 and 109
The least common multiple (LCM) of 78 and 109 is 8502.
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 78 and 109?
First, calculate the GCD of 78 and 109 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 109 = 0 remainder 78 |
| 2 | 109 ÷ 78 = 1 remainder 31 |
| 3 | 78 ÷ 31 = 2 remainder 16 |
| 4 | 31 ÷ 16 = 1 remainder 15 |
| 5 | 16 ÷ 15 = 1 remainder 1 |
| 6 | 15 ÷ 1 = 15 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 178 and 61 | 10858 |
| 70 and 197 | 13790 |
| 78 and 174 | 2262 |
| 44 and 51 | 2244 |
| 132 and 66 | 132 |