Least Common Multiple (LCM) of 120 and 90
The least common multiple (LCM) of 120 and 90 is 360.
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 120 and 90?
First, calculate the GCD of 120 and 90 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 120 ÷ 90 = 1 remainder 30 |
| 2 | 90 ÷ 30 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 175 and 50 | 350 |
| 85 and 17 | 85 |
| 194 and 50 | 4850 |
| 189 and 97 | 18333 |
| 30 and 83 | 2490 |