Least Common Multiple (LCM) of 80 and 105
The least common multiple (LCM) of 80 and 105 is 1680.
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 80 and 105?
First, calculate the GCD of 80 and 105 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 80 ÷ 105 = 0 remainder 80 |
| 2 | 105 ÷ 80 = 1 remainder 25 |
| 3 | 80 ÷ 25 = 3 remainder 5 |
| 4 | 25 ÷ 5 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 15 and 71 | 1065 |
| 38 and 14 | 266 |
| 107 and 31 | 3317 |
| 162 and 195 | 10530 |
| 126 and 16 | 1008 |