Least Common Multiple (LCM) of 77 and 138
The least common multiple (LCM) of 77 and 138 is 10626.
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 77 and 138?
First, calculate the GCD of 77 and 138 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 77 ÷ 138 = 0 remainder 77 |
| 2 | 138 ÷ 77 = 1 remainder 61 |
| 3 | 77 ÷ 61 = 1 remainder 16 |
| 4 | 61 ÷ 16 = 3 remainder 13 |
| 5 | 16 ÷ 13 = 1 remainder 3 |
| 6 | 13 ÷ 3 = 4 remainder 1 |
| 7 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 18 and 97 | 1746 |
| 94 and 74 | 3478 |
| 176 and 76 | 3344 |
| 95 and 66 | 6270 |
| 193 and 165 | 31845 |