Least Common Multiple (LCM) of 191 and 121
The least common multiple (LCM) of 191 and 121 is 23111.
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 191 and 121?
First, calculate the GCD of 191 and 121 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 191 ÷ 121 = 1 remainder 70 |
| 2 | 121 ÷ 70 = 1 remainder 51 |
| 3 | 70 ÷ 51 = 1 remainder 19 |
| 4 | 51 ÷ 19 = 2 remainder 13 |
| 5 | 19 ÷ 13 = 1 remainder 6 |
| 6 | 13 ÷ 6 = 2 remainder 1 |
| 7 | 6 ÷ 1 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 116 and 20 | 580 |
| 103 and 142 | 14626 |
| 195 and 161 | 31395 |
| 138 and 38 | 2622 |
| 89 and 69 | 6141 |