Least Common Multiple (LCM) of 61 and 80
The least common multiple (LCM) of 61 and 80 is 4880.
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 61 and 80?
First, calculate the GCD of 61 and 80 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 61 ÷ 80 = 0 remainder 61 |
| 2 | 80 ÷ 61 = 1 remainder 19 |
| 3 | 61 ÷ 19 = 3 remainder 4 |
| 4 | 19 ÷ 4 = 4 remainder 3 |
| 5 | 4 ÷ 3 = 1 remainder 1 |
| 6 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 33 and 61 | 2013 |
| 55 and 139 | 7645 |
| 155 and 75 | 2325 |
| 95 and 41 | 3895 |
| 19 and 40 | 760 |