Least Common Multiple (LCM) of 42 and 170
The least common multiple (LCM) of 42 and 170 is 3570.
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 170?
First, calculate the GCD of 42 and 170 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 170 = 0 remainder 42 |
| 2 | 170 ÷ 42 = 4 remainder 2 |
| 3 | 42 ÷ 2 = 21 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 129 and 167 | 21543 |
| 188 and 193 | 36284 |
| 153 and 12 | 612 |
| 144 and 18 | 144 |
| 46 and 38 | 874 |