Least Common Multiple (LCM) of 124 and 21
The least common multiple (LCM) of 124 and 21 is 2604.
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 124 and 21?
First, calculate the GCD of 124 and 21 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 124 ÷ 21 = 5 remainder 19 |
| 2 | 21 ÷ 19 = 1 remainder 2 |
| 3 | 19 ÷ 2 = 9 remainder 1 |
| 4 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 40 and 43 | 1720 |
| 170 and 21 | 3570 |
| 135 and 179 | 24165 |
| 165 and 60 | 660 |
| 199 and 11 | 2189 |