Least Common Multiple (LCM) of 155 and 20
The least common multiple (LCM) of 155 and 20 is 620.
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 155 and 20?
First, calculate the GCD of 155 and 20 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 155 ÷ 20 = 7 remainder 15 |
| 2 | 20 ÷ 15 = 1 remainder 5 |
| 3 | 15 ÷ 5 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 176 and 55 | 880 |
| 184 and 21 | 3864 |
| 135 and 86 | 11610 |
| 55 and 188 | 10340 |
| 75 and 49 | 3675 |