Least Common Multiple (LCM) of 21 and 93
The least common multiple (LCM) of 21 and 93 is 651.
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 93?
First, calculate the GCD of 21 and 93 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 93 = 0 remainder 21 |
| 2 | 93 ÷ 21 = 4 remainder 9 |
| 3 | 21 ÷ 9 = 2 remainder 3 |
| 4 | 9 ÷ 3 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 116 and 192 | 5568 |
| 186 and 193 | 35898 |
| 178 and 76 | 6764 |
| 55 and 38 | 2090 |
| 104 and 84 | 2184 |