Least Common Multiple (LCM) of 18 and 143
The least common multiple (LCM) of 18 and 143 is 2574.
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 18 and 143?
First, calculate the GCD of 18 and 143 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 18 ÷ 143 = 0 remainder 18 |
| 2 | 143 ÷ 18 = 7 remainder 17 |
| 3 | 18 ÷ 17 = 1 remainder 1 |
| 4 | 17 ÷ 1 = 17 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 33 and 39 | 429 |
| 16 and 49 | 784 |
| 71 and 155 | 11005 |
| 105 and 17 | 1785 |
| 87 and 90 | 2610 |