Least Common Multiple (LCM) of 40 and 65
The least common multiple (LCM) of 40 and 65 is 520.
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 40 and 65?
First, calculate the GCD of 40 and 65 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 40 ÷ 65 = 0 remainder 40 |
| 2 | 65 ÷ 40 = 1 remainder 25 |
| 3 | 40 ÷ 25 = 1 remainder 15 |
| 4 | 25 ÷ 15 = 1 remainder 10 |
| 5 | 15 ÷ 10 = 1 remainder 5 |
| 6 | 10 ÷ 5 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 135 and 64 | 8640 |
| 100 and 46 | 2300 |
| 155 and 161 | 24955 |
| 63 and 164 | 10332 |
| 157 and 127 | 19939 |