Least Common Multiple (LCM) of 42 and 25
The least common multiple (LCM) of 42 and 25 is 1050.
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 25?
First, calculate the GCD of 42 and 25 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 25 = 1 remainder 17 |
| 2 | 25 ÷ 17 = 1 remainder 8 |
| 3 | 17 ÷ 8 = 2 remainder 1 |
| 4 | 8 ÷ 1 = 8 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 46 and 117 | 5382 |
| 139 and 65 | 9035 |
| 105 and 118 | 12390 |
| 74 and 161 | 11914 |
| 74 and 142 | 5254 |