Least Common Multiple (LCM) of 42 and 70
The least common multiple (LCM) of 42 and 70 is 210.
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 70?
First, calculate the GCD of 42 and 70 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 70 = 0 remainder 42 |
| 2 | 70 ÷ 42 = 1 remainder 28 |
| 3 | 42 ÷ 28 = 1 remainder 14 |
| 4 | 28 ÷ 14 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 71 and 83 | 5893 |
| 198 and 171 | 3762 |
| 75 and 189 | 4725 |
| 67 and 78 | 5226 |
| 50 and 15 | 150 |