Least Common Multiple (LCM) of 21 and 116
The least common multiple (LCM) of 21 and 116 is 2436.
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 21 and 116?
First, calculate the GCD of 21 and 116 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 116 = 0 remainder 21 |
| 2 | 116 ÷ 21 = 5 remainder 11 |
| 3 | 21 ÷ 11 = 1 remainder 10 |
| 4 | 11 ÷ 10 = 1 remainder 1 |
| 5 | 10 ÷ 1 = 10 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 15 and 109 | 1635 |
| 25 and 77 | 1925 |
| 155 and 29 | 4495 |
| 82 and 148 | 6068 |
| 175 and 111 | 19425 |