Least Common Multiple (LCM) of 42 and 153
The least common multiple (LCM) of 42 and 153 is 2142.
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 42 and 153?
First, calculate the GCD of 42 and 153 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 153 = 0 remainder 42 |
| 2 | 153 ÷ 42 = 3 remainder 27 |
| 3 | 42 ÷ 27 = 1 remainder 15 |
| 4 | 27 ÷ 15 = 1 remainder 12 |
| 5 | 15 ÷ 12 = 1 remainder 3 |
| 6 | 12 ÷ 3 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 144 and 189 | 3024 |
| 64 and 57 | 3648 |
| 145 and 72 | 10440 |
| 178 and 56 | 4984 |
| 58 and 160 | 4640 |