Least Common Multiple (LCM) of 61 and 79
The least common multiple (LCM) of 61 and 79 is 4819.
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 79?
First, calculate the GCD of 61 and 79 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 61 ÷ 79 = 0 remainder 61 |
| 2 | 79 ÷ 61 = 1 remainder 18 |
| 3 | 61 ÷ 18 = 3 remainder 7 |
| 4 | 18 ÷ 7 = 2 remainder 4 |
| 5 | 7 ÷ 4 = 1 remainder 3 |
| 6 | 4 ÷ 3 = 1 remainder 1 |
| 7 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 109 and 196 | 21364 |
| 90 and 122 | 5490 |
| 193 and 85 | 16405 |
| 138 and 153 | 7038 |
| 87 and 91 | 7917 |