Least Common Multiple (LCM) of 47 and 28
The least common multiple (LCM) of 47 and 28 is 1316.
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 28?
First, calculate the GCD of 47 and 28 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 47 ÷ 28 = 1 remainder 19 |
| 2 | 28 ÷ 19 = 1 remainder 9 |
| 3 | 19 ÷ 9 = 2 remainder 1 |
| 4 | 9 ÷ 1 = 9 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 150 and 31 | 4650 |
| 21 and 20 | 420 |
| 39 and 87 | 1131 |
| 59 and 166 | 9794 |
| 56 and 181 | 10136 |