Least Common Multiple (LCM) of 78 and 126
The least common multiple (LCM) of 78 and 126 is 1638.
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 126?
First, calculate the GCD of 78 and 126 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 126 = 0 remainder 78 |
| 2 | 126 ÷ 78 = 1 remainder 48 |
| 3 | 78 ÷ 48 = 1 remainder 30 |
| 4 | 48 ÷ 30 = 1 remainder 18 |
| 5 | 30 ÷ 18 = 1 remainder 12 |
| 6 | 18 ÷ 12 = 1 remainder 6 |
| 7 | 12 ÷ 6 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 132 and 100 | 3300 |
| 74 and 47 | 3478 |
| 125 and 95 | 2375 |
| 62 and 80 | 2480 |
| 49 and 172 | 8428 |