Least Common Multiple (LCM) of 42 and 128
The least common multiple (LCM) of 42 and 128 is 2688.
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 42 and 128?
First, calculate the GCD of 42 and 128 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 128 = 0 remainder 42 |
| 2 | 128 ÷ 42 = 3 remainder 2 |
| 3 | 42 ÷ 2 = 21 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 174 and 83 | 14442 |
| 196 and 180 | 8820 |
| 187 and 97 | 18139 |
| 30 and 83 | 2490 |
| 168 and 75 | 4200 |