Least Common Multiple (LCM) of 138 and 170
The least common multiple (LCM) of 138 and 170 is 11730.
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 138 and 170?
First, calculate the GCD of 138 and 170 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 170 = 0 remainder 138 |
| 2 | 170 ÷ 138 = 1 remainder 32 |
| 3 | 138 ÷ 32 = 4 remainder 10 |
| 4 | 32 ÷ 10 = 3 remainder 2 |
| 5 | 10 ÷ 2 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 62 and 72 | 2232 |
| 154 and 196 | 2156 |
| 107 and 148 | 15836 |
| 192 and 24 | 192 |
| 140 and 128 | 4480 |