Least Common Multiple (LCM) of 121 and 77
The least common multiple (LCM) of 121 and 77 is 847.
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 121 and 77?
First, calculate the GCD of 121 and 77 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 121 ÷ 77 = 1 remainder 44 |
| 2 | 77 ÷ 44 = 1 remainder 33 |
| 3 | 44 ÷ 33 = 1 remainder 11 |
| 4 | 33 ÷ 11 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 43 and 30 | 1290 |
| 163 and 56 | 9128 |
| 85 and 197 | 16745 |
| 178 and 22 | 1958 |
| 25 and 98 | 2450 |