Least Common Multiple (LCM) of 42 and 28
The least common multiple (LCM) of 42 and 28 is 84.
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 28?
First, calculate the GCD of 42 and 28 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 42 ÷ 28 = 1 remainder 14 |
| 2 | 28 ÷ 14 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 169 and 12 | 2028 |
| 197 and 175 | 34475 |
| 127 and 103 | 13081 |
| 124 and 183 | 22692 |
| 152 and 110 | 8360 |