Least Common Multiple (LCM) of 71 and 80
The least common multiple (LCM) of 71 and 80 is 5680.
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 71 and 80?
First, calculate the GCD of 71 and 80 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 71 ÷ 80 = 0 remainder 71 |
| 2 | 80 ÷ 71 = 1 remainder 9 |
| 3 | 71 ÷ 9 = 7 remainder 8 |
| 4 | 9 ÷ 8 = 1 remainder 1 |
| 5 | 8 ÷ 1 = 8 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 30 and 23 | 690 |
| 71 and 151 | 10721 |
| 64 and 154 | 4928 |
| 25 and 177 | 4425 |
| 140 and 10 | 140 |