Least Common Multiple (LCM) of 120 and 171
The least common multiple (LCM) of 120 and 171 is 6840.
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 171?
First, calculate the GCD of 120 and 171 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 120 ÷ 171 = 0 remainder 120 |
| 2 | 171 ÷ 120 = 1 remainder 51 |
| 3 | 120 ÷ 51 = 2 remainder 18 |
| 4 | 51 ÷ 18 = 2 remainder 15 |
| 5 | 18 ÷ 15 = 1 remainder 3 |
| 6 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 42 and 64 | 1344 |
| 141 and 121 | 17061 |
| 114 and 25 | 2850 |
| 118 and 96 | 5664 |
| 169 and 161 | 27209 |