Android lock screen
In the above passcode, we mark the points 1-5-9-6-3-7.
How many combinations does Android 9 point unlock have?
- Each pattern must connect at least four dots.
- The marked points are distinct.
- Once the point is marked it can not be marked again.
- You can jump over a marked point, but cannot jump over an unmarked point. For example, at the start we could not jump over the 5. But at the end, we jumped over the 5.