Least Common Multiple (LCM) of 30 and 55
The least common multiple (LCM) of 30 and 55 is 330.
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 30 and 55?
First, calculate the GCD of 30 and 55 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 30 ÷ 55 = 0 remainder 30 |
| 2 | 55 ÷ 30 = 1 remainder 25 |
| 3 | 30 ÷ 25 = 1 remainder 5 |
| 4 | 25 ÷ 5 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 157 and 42 | 6594 |
| 90 and 91 | 8190 |
| 56 and 157 | 8792 |
| 156 and 139 | 21684 |
| 13 and 185 | 2405 |