Least Common Multiple (LCM) of 168 and 42
The least common multiple (LCM) of 168 and 42 is 168.
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 168 and 42?
First, calculate the GCD of 168 and 42 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 168 ÷ 42 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 128 and 153 | 19584 |
| 59 and 136 | 8024 |
| 171 and 17 | 2907 |
| 152 and 61 | 9272 |
| 152 and 19 | 152 |