Least Common Multiple (LCM) of 100 and 78
The least common multiple (LCM) of 100 and 78 is 3900.
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 100 and 78?
First, calculate the GCD of 100 and 78 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 100 ÷ 78 = 1 remainder 22 |
| 2 | 78 ÷ 22 = 3 remainder 12 |
| 3 | 22 ÷ 12 = 1 remainder 10 |
| 4 | 12 ÷ 10 = 1 remainder 2 |
| 5 | 10 ÷ 2 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 95 and 133 | 665 |
| 28 and 23 | 644 |
| 42 and 43 | 1806 |
| 23 and 53 | 1219 |
| 91 and 155 | 14105 |