Least Common Multiple (LCM) of 42 and 139
The least common multiple (LCM) of 42 and 139 is 5838.
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 42 and 139?
First, calculate the GCD of 42 and 139 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 139 = 0 remainder 42 |
| 2 | 139 ÷ 42 = 3 remainder 13 |
| 3 | 42 ÷ 13 = 3 remainder 3 |
| 4 | 13 ÷ 3 = 4 remainder 1 |
| 5 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 125 and 115 | 2875 |
| 138 and 107 | 14766 |
| 152 and 85 | 12920 |
| 134 and 11 | 1474 |
| 110 and 14 | 770 |