Least Common Multiple (LCM) of 15 and 140
The least common multiple (LCM) of 15 and 140 is 420.
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 15 and 140?
First, calculate the GCD of 15 and 140 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 15 ÷ 140 = 0 remainder 15 |
| 2 | 140 ÷ 15 = 9 remainder 5 |
| 3 | 15 ÷ 5 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 131 and 111 | 14541 |
| 84 and 111 | 3108 |
| 179 and 131 | 23449 |
| 116 and 120 | 3480 |
| 70 and 128 | 4480 |