Least Common Multiple (LCM) of 13 and 189
The least common multiple (LCM) of 13 and 189 is 2457.
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 13 and 189?
First, calculate the GCD of 13 and 189 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 13 ÷ 189 = 0 remainder 13 |
| 2 | 189 ÷ 13 = 14 remainder 7 |
| 3 | 13 ÷ 7 = 1 remainder 6 |
| 4 | 7 ÷ 6 = 1 remainder 1 |
| 5 | 6 ÷ 1 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 137 and 168 | 23016 |
| 168 and 160 | 3360 |
| 50 and 91 | 4550 |
| 97 and 142 | 13774 |
| 168 and 78 | 2184 |