Least Common Multiple (LCM) of 78 and 142
The least common multiple (LCM) of 78 and 142 is 5538.
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 142?
First, calculate the GCD of 78 and 142 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 142 = 0 remainder 78 |
| 2 | 142 ÷ 78 = 1 remainder 64 |
| 3 | 78 ÷ 64 = 1 remainder 14 |
| 4 | 64 ÷ 14 = 4 remainder 8 |
| 5 | 14 ÷ 8 = 1 remainder 6 |
| 6 | 8 ÷ 6 = 1 remainder 2 |
| 7 | 6 ÷ 2 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 45 and 21 | 315 |
| 17 and 68 | 68 |
| 40 and 128 | 640 |
| 183 and 191 | 34953 |
| 12 and 132 | 132 |