Least Common Multiple (LCM) of 21 and 200
The least common multiple (LCM) of 21 and 200 is 4200.
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 21 and 200?
First, calculate the GCD of 21 and 200 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 200 = 0 remainder 21 |
| 2 | 200 ÷ 21 = 9 remainder 11 |
| 3 | 21 ÷ 11 = 1 remainder 10 |
| 4 | 11 ÷ 10 = 1 remainder 1 |
| 5 | 10 ÷ 1 = 10 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 166 and 185 | 30710 |
| 101 and 198 | 19998 |
| 170 and 44 | 3740 |
| 189 and 172 | 32508 |
| 154 and 153 | 23562 |