Least Common Multiple (LCM) of 30 and 108
The least common multiple (LCM) of 30 and 108 is 540.
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 108?
First, calculate the GCD of 30 and 108 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 30 ÷ 108 = 0 remainder 30 |
| 2 | 108 ÷ 30 = 3 remainder 18 |
| 3 | 30 ÷ 18 = 1 remainder 12 |
| 4 | 18 ÷ 12 = 1 remainder 6 |
| 5 | 12 ÷ 6 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 171 and 149 | 25479 |
| 126 and 91 | 1638 |
| 147 and 186 | 9114 |
| 153 and 56 | 8568 |
| 63 and 145 | 9135 |