Least Common Multiple (LCM) of 105 and 128
The least common multiple (LCM) of 105 and 128 is 13440.
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 105 and 128?
First, calculate the GCD of 105 and 128 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 105 ÷ 128 = 0 remainder 105 |
| 2 | 128 ÷ 105 = 1 remainder 23 |
| 3 | 105 ÷ 23 = 4 remainder 13 |
| 4 | 23 ÷ 13 = 1 remainder 10 |
| 5 | 13 ÷ 10 = 1 remainder 3 |
| 6 | 10 ÷ 3 = 3 remainder 1 |
| 7 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 112 and 98 | 784 |
| 20 and 119 | 2380 |
| 143 and 150 | 21450 |
| 174 and 42 | 1218 |
| 52 and 12 | 156 |