Least Common Multiple (LCM) of 158 and 21
The least common multiple (LCM) of 158 and 21 is 3318.
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 158 and 21?
First, calculate the GCD of 158 and 21 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 158 ÷ 21 = 7 remainder 11 |
| 2 | 21 ÷ 11 = 1 remainder 10 |
| 3 | 11 ÷ 10 = 1 remainder 1 |
| 4 | 10 ÷ 1 = 10 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 197 and 163 | 32111 |
| 121 and 43 | 5203 |
| 158 and 74 | 5846 |
| 72 and 188 | 3384 |
| 16 and 180 | 720 |