Least Common Multiple (LCM) of 18 and 63
The least common multiple (LCM) of 18 and 63 is 126.
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 63?
First, calculate the GCD of 18 and 63 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 18 ÷ 63 = 0 remainder 18 |
| 2 | 63 ÷ 18 = 3 remainder 9 |
| 3 | 18 ÷ 9 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 82 and 169 | 13858 |
| 109 and 80 | 8720 |
| 36 and 124 | 1116 |
| 138 and 195 | 8970 |
| 13 and 197 | 2561 |