Least Common Multiple (LCM) of 55 and 77
The least common multiple (LCM) of 55 and 77 is 385.
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 55 and 77?
First, calculate the GCD of 55 and 77 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 55 ÷ 77 = 0 remainder 55 |
| 2 | 77 ÷ 55 = 1 remainder 22 |
| 3 | 55 ÷ 22 = 2 remainder 11 |
| 4 | 22 ÷ 11 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 128 and 60 | 1920 |
| 134 and 49 | 6566 |
| 196 and 170 | 16660 |
| 124 and 72 | 2232 |
| 113 and 172 | 19436 |