Least Common Multiple (LCM) of 105 and 56
The least common multiple (LCM) of 105 and 56 is 840.
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 56?
First, calculate the GCD of 105 and 56 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 105 ÷ 56 = 1 remainder 49 |
| 2 | 56 ÷ 49 = 1 remainder 7 |
| 3 | 49 ÷ 7 = 7 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 152 and 13 | 1976 |
| 83 and 15 | 1245 |
| 66 and 162 | 1782 |
| 13 and 172 | 2236 |
| 104 and 90 | 4680 |