Least Common Multiple (LCM) of 61 and 69
The least common multiple (LCM) of 61 and 69 is 4209.
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 61 and 69?
First, calculate the GCD of 61 and 69 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 61 ÷ 69 = 0 remainder 61 |
| 2 | 69 ÷ 61 = 1 remainder 8 |
| 3 | 61 ÷ 8 = 7 remainder 5 |
| 4 | 8 ÷ 5 = 1 remainder 3 |
| 5 | 5 ÷ 3 = 1 remainder 2 |
| 6 | 3 ÷ 2 = 1 remainder 1 |
| 7 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 85 and 159 | 13515 |
| 59 and 162 | 9558 |
| 139 and 65 | 9035 |
| 189 and 67 | 12663 |
| 158 and 33 | 5214 |