Least Common Multiple (LCM) of 90 and 155
The least common multiple (LCM) of 90 and 155 is 2790.
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 90 and 155?
First, calculate the GCD of 90 and 155 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 90 ÷ 155 = 0 remainder 90 |
| 2 | 155 ÷ 90 = 1 remainder 65 |
| 3 | 90 ÷ 65 = 1 remainder 25 |
| 4 | 65 ÷ 25 = 2 remainder 15 |
| 5 | 25 ÷ 15 = 1 remainder 10 |
| 6 | 15 ÷ 10 = 1 remainder 5 |
| 7 | 10 ÷ 5 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 95 and 127 | 12065 |
| 38 and 104 | 1976 |
| 105 and 194 | 20370 |
| 130 and 21 | 2730 |
| 120 and 132 | 1320 |