Least Common Multiple (LCM) of 78 and 98
The least common multiple (LCM) of 78 and 98 is 3822.
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 78 and 98?
First, calculate the GCD of 78 and 98 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 78 ÷ 98 = 0 remainder 78 |
| 2 | 98 ÷ 78 = 1 remainder 20 |
| 3 | 78 ÷ 20 = 3 remainder 18 |
| 4 | 20 ÷ 18 = 1 remainder 2 |
| 5 | 18 ÷ 2 = 9 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 173 and 102 | 17646 |
| 61 and 137 | 8357 |
| 182 and 21 | 546 |
| 31 and 64 | 1984 |
| 167 and 33 | 5511 |