Least Common Multiple (LCM) of 55 and 42
The least common multiple (LCM) of 55 and 42 is 2310.
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 42?
First, calculate the GCD of 55 and 42 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 55 ÷ 42 = 1 remainder 13 |
| 2 | 42 ÷ 13 = 3 remainder 3 |
| 3 | 13 ÷ 3 = 4 remainder 1 |
| 4 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 83 and 20 | 1660 |
| 109 and 127 | 13843 |
| 103 and 94 | 9682 |
| 46 and 53 | 2438 |
| 171 and 177 | 10089 |