Least Common Multiple (LCM) of 77 and 90
The least common multiple (LCM) of 77 and 90 is 6930.
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 77 and 90?
First, calculate the GCD of 77 and 90 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 77 ÷ 90 = 0 remainder 77 |
| 2 | 90 ÷ 77 = 1 remainder 13 |
| 3 | 77 ÷ 13 = 5 remainder 12 |
| 4 | 13 ÷ 12 = 1 remainder 1 |
| 5 | 12 ÷ 1 = 12 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 117 and 183 | 7137 |
| 94 and 130 | 6110 |
| 21 and 86 | 1806 |
| 149 and 74 | 11026 |
| 37 and 44 | 1628 |