Least Common Multiple (LCM) of 78 and 120
The least common multiple (LCM) of 78 and 120 is 1560.
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 120?
First, calculate the GCD of 78 and 120 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 120 = 0 remainder 78 |
| 2 | 120 ÷ 78 = 1 remainder 42 |
| 3 | 78 ÷ 42 = 1 remainder 36 |
| 4 | 42 ÷ 36 = 1 remainder 6 |
| 5 | 36 ÷ 6 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 15 and 180 | 180 |
| 197 and 10 | 1970 |
| 177 and 106 | 18762 |
| 188 and 113 | 21244 |
| 61 and 102 | 6222 |