Least Common Multiple (LCM) of 138 and 40
The least common multiple (LCM) of 138 and 40 is 2760.
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 40?
First, calculate the GCD of 138 and 40 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 40 = 3 remainder 18 |
| 2 | 40 ÷ 18 = 2 remainder 4 |
| 3 | 18 ÷ 4 = 4 remainder 2 |
| 4 | 4 ÷ 2 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 16 and 167 | 2672 |
| 31 and 171 | 5301 |
| 114 and 108 | 2052 |
| 39 and 13 | 39 |
| 148 and 168 | 6216 |