Least Common Multiple (LCM) of 72 and 28
The least common multiple (LCM) of 72 and 28 is 504.
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 72 and 28?
First, calculate the GCD of 72 and 28 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 72 ÷ 28 = 2 remainder 16 |
| 2 | 28 ÷ 16 = 1 remainder 12 |
| 3 | 16 ÷ 12 = 1 remainder 4 |
| 4 | 12 ÷ 4 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 99 and 177 | 5841 |
| 64 and 100 | 1600 |
| 140 and 168 | 840 |
| 107 and 72 | 7704 |
| 161 and 193 | 31073 |