Least Common Multiple (LCM) of 47 and 72
The least common multiple (LCM) of 47 and 72 is 3384.
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 47 and 72?
First, calculate the GCD of 47 and 72 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 47 ÷ 72 = 0 remainder 47 |
| 2 | 72 ÷ 47 = 1 remainder 25 |
| 3 | 47 ÷ 25 = 1 remainder 22 |
| 4 | 25 ÷ 22 = 1 remainder 3 |
| 5 | 22 ÷ 3 = 7 remainder 1 |
| 6 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 65 and 38 | 2470 |
| 84 and 113 | 9492 |
| 174 and 129 | 7482 |
| 39 and 194 | 7566 |
| 117 and 128 | 14976 |