Least Common Multiple (LCM) of 21 and 48
The least common multiple (LCM) of 21 and 48 is 336.
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 48?
First, calculate the GCD of 21 and 48 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 48 = 0 remainder 21 |
| 2 | 48 ÷ 21 = 2 remainder 6 |
| 3 | 21 ÷ 6 = 3 remainder 3 |
| 4 | 6 ÷ 3 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 43 and 177 | 7611 |
| 131 and 21 | 2751 |
| 26 and 152 | 1976 |
| 181 and 198 | 35838 |
| 17 and 165 | 2805 |