Least Common Multiple (LCM) of 42 and 165
The least common multiple (LCM) of 42 and 165 is 2310.
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 165?
First, calculate the GCD of 42 and 165 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 165 = 0 remainder 42 |
| 2 | 165 ÷ 42 = 3 remainder 39 |
| 3 | 42 ÷ 39 = 1 remainder 3 |
| 4 | 39 ÷ 3 = 13 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 87 and 38 | 3306 |
| 186 and 168 | 5208 |
| 16 and 150 | 1200 |
| 191 and 68 | 12988 |
| 167 and 28 | 4676 |