Least Common Multiple (LCM) of 71 and 91
The least common multiple (LCM) of 71 and 91 is 6461.
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 71 and 91?
First, calculate the GCD of 71 and 91 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 71 ÷ 91 = 0 remainder 71 |
| 2 | 91 ÷ 71 = 1 remainder 20 |
| 3 | 71 ÷ 20 = 3 remainder 11 |
| 4 | 20 ÷ 11 = 1 remainder 9 |
| 5 | 11 ÷ 9 = 1 remainder 2 |
| 6 | 9 ÷ 2 = 4 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 199 and 124 | 24676 |
| 77 and 143 | 1001 |
| 80 and 63 | 5040 |
| 168 and 87 | 4872 |
| 182 and 79 | 14378 |