Least Common Multiple (LCM) of 72 and 123
The least common multiple (LCM) of 72 and 123 is 2952.
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 123?
First, calculate the GCD of 72 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 72 ÷ 123 = 0 remainder 72 |
| 2 | 123 ÷ 72 = 1 remainder 51 |
| 3 | 72 ÷ 51 = 1 remainder 21 |
| 4 | 51 ÷ 21 = 2 remainder 9 |
| 5 | 21 ÷ 9 = 2 remainder 3 |
| 6 | 9 ÷ 3 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 159 and 34 | 5406 |
| 157 and 148 | 23236 |
| 145 and 43 | 6235 |
| 28 and 77 | 308 |
| 161 and 110 | 17710 |