Least Common Multiple (LCM) of 87 and 91
The least common multiple (LCM) of 87 and 91 is 7917.
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 87 and 91?
First, calculate the GCD of 87 and 91 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 87 ÷ 91 = 0 remainder 87 |
| 2 | 91 ÷ 87 = 1 remainder 4 |
| 3 | 87 ÷ 4 = 21 remainder 3 |
| 4 | 4 ÷ 3 = 1 remainder 1 |
| 5 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 178 and 152 | 13528 |
| 185 and 194 | 35890 |
| 126 and 120 | 2520 |
| 146 and 175 | 25550 |
| 30 and 100 | 300 |