Least Common Multiple (LCM) of 15 and 65
The least common multiple (LCM) of 15 and 65 is 195.
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 15 and 65?
First, calculate the GCD of 15 and 65 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 15 ÷ 65 = 0 remainder 15 |
| 2 | 65 ÷ 15 = 4 remainder 5 |
| 3 | 15 ÷ 5 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 63 and 16 | 1008 |
| 138 and 132 | 3036 |
| 171 and 163 | 27873 |
| 131 and 134 | 17554 |
| 125 and 196 | 24500 |