Least Common Multiple (LCM) of 18 and 51
The least common multiple (LCM) of 18 and 51 is 306.
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 51?
First, calculate the GCD of 18 and 51 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 18 ÷ 51 = 0 remainder 18 |
| 2 | 51 ÷ 18 = 2 remainder 15 |
| 3 | 18 ÷ 15 = 1 remainder 3 |
| 4 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 138 and 172 | 11868 |
| 42 and 133 | 798 |
| 87 and 196 | 17052 |
| 105 and 122 | 12810 |
| 188 and 43 | 8084 |