Least Common Multiple (LCM) of 81 and 53
The least common multiple (LCM) of 81 and 53 is 4293.
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 81 and 53?
First, calculate the GCD of 81 and 53 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 53 = 1 remainder 28 |
| 2 | 53 ÷ 28 = 1 remainder 25 |
| 3 | 28 ÷ 25 = 1 remainder 3 |
| 4 | 25 ÷ 3 = 8 remainder 1 |
| 5 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 172 and 155 | 26660 |
| 160 and 118 | 9440 |
| 153 and 33 | 1683 |
| 138 and 136 | 9384 |
| 173 and 68 | 11764 |