Least Common Multiple (LCM) of 21 and 46
The least common multiple (LCM) of 21 and 46 is 966.
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 46?
First, calculate the GCD of 21 and 46 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 46 = 0 remainder 21 |
| 2 | 46 ÷ 21 = 2 remainder 4 |
| 3 | 21 ÷ 4 = 5 remainder 1 |
| 4 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 130 and 122 | 7930 |
| 27 and 34 | 918 |
| 188 and 116 | 5452 |
| 168 and 100 | 4200 |
| 109 and 24 | 2616 |