Least Common Multiple (LCM) of 91 and 57
The least common multiple (LCM) of 91 and 57 is 5187.
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 91 and 57?
First, calculate the GCD of 91 and 57 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 91 ÷ 57 = 1 remainder 34 |
| 2 | 57 ÷ 34 = 1 remainder 23 |
| 3 | 34 ÷ 23 = 1 remainder 11 |
| 4 | 23 ÷ 11 = 2 remainder 1 |
| 5 | 11 ÷ 1 = 11 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 139 and 111 | 15429 |
| 67 and 162 | 10854 |
| 51 and 103 | 5253 |
| 20 and 156 | 780 |
| 54 and 72 | 216 |