Least Common Multiple (LCM) of 87 and 140
The least common multiple (LCM) of 87 and 140 is 12180.
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 140?
First, calculate the GCD of 87 and 140 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 87 ÷ 140 = 0 remainder 87 |
| 2 | 140 ÷ 87 = 1 remainder 53 |
| 3 | 87 ÷ 53 = 1 remainder 34 |
| 4 | 53 ÷ 34 = 1 remainder 19 |
| 5 | 34 ÷ 19 = 1 remainder 15 |
| 6 | 19 ÷ 15 = 1 remainder 4 |
| 7 | 15 ÷ 4 = 3 remainder 3 |
| 8 | 4 ÷ 3 = 1 remainder 1 |
| 9 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 77 and 122 | 9394 |
| 91 and 127 | 11557 |
| 25 and 99 | 2475 |
| 146 and 116 | 8468 |
| 136 and 108 | 3672 |