Least Common Multiple (LCM) of 21 and 152
The least common multiple (LCM) of 21 and 152 is 3192.
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 152?
First, calculate the GCD of 21 and 152 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 152 = 0 remainder 21 |
| 2 | 152 ÷ 21 = 7 remainder 5 |
| 3 | 21 ÷ 5 = 4 remainder 1 |
| 4 | 5 ÷ 1 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 15 and 145 | 435 |
| 35 and 87 | 3045 |
| 196 and 33 | 6468 |
| 87 and 38 | 3306 |
| 87 and 72 | 2088 |