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 |
|---|---|
| 100 and 70 | 700 |
| 178 and 46 | 4094 |
| 140 and 63 | 1260 |
| 113 and 75 | 8475 |
| 181 and 149 | 26969 |