Least Common Multiple (LCM) of 98 and 81
The least common multiple (LCM) of 98 and 81 is 7938.
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 98 and 81?
First, calculate the GCD of 98 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 98 ÷ 81 = 1 remainder 17 |
| 2 | 81 ÷ 17 = 4 remainder 13 |
| 3 | 17 ÷ 13 = 1 remainder 4 |
| 4 | 13 ÷ 4 = 3 remainder 1 |
| 5 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 122 and 75 | 9150 |
| 135 and 168 | 7560 |
| 153 and 90 | 1530 |
| 130 and 149 | 19370 |
| 26 and 86 | 1118 |