Least Common Multiple (LCM) of 20 and 198
The least common multiple (LCM) of 20 and 198 is 1980.
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 20 and 198?
First, calculate the GCD of 20 and 198 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 198 = 0 remainder 20 |
| 2 | 198 ÷ 20 = 9 remainder 18 |
| 3 | 20 ÷ 18 = 1 remainder 2 |
| 4 | 18 ÷ 2 = 9 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 40 and 162 | 3240 |
| 74 and 70 | 2590 |
| 83 and 64 | 5312 |
| 102 and 13 | 1326 |
| 56 and 165 | 9240 |