Least Common Multiple (LCM) of 121 and 140
The least common multiple (LCM) of 121 and 140 is 16940.
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 121 and 140?
First, calculate the GCD of 121 and 140 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 121 ÷ 140 = 0 remainder 121 |
| 2 | 140 ÷ 121 = 1 remainder 19 |
| 3 | 121 ÷ 19 = 6 remainder 7 |
| 4 | 19 ÷ 7 = 2 remainder 5 |
| 5 | 7 ÷ 5 = 1 remainder 2 |
| 6 | 5 ÷ 2 = 2 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 168 and 69 | 3864 |
| 164 and 81 | 13284 |
| 115 and 80 | 1840 |
| 20 and 99 | 1980 |
| 92 and 165 | 15180 |