Internet users like tests for intelligence and perception because they can measure their mental abilities.
Of course, if you cannot solve the puzzle, few would admit it. Everyone wants to be quick and intelligent and to reconcile difficult challenges. The situation looks a bit different when it is possible to solve a difficult puzzle. Then we want to say this to the entire world and by this, get some value.
The following riddle is not difficult, but it is easy to reply to it quickly. It will be useful to think logically and to know the rules of perspective. If you are an architect or student of architecture, you will give the correct answer in three seconds. Others may have a few more problems with this, but that does not mean they have no chance. If they are able to think logically, they will deal with the puzzle as quickly as possible.
Take a closer look at the illustration and indicate which line is actually the longest. Will it be simple A, the background image, straight B, being the length of a single building or straight line C, corresponding to the length of two buildings? Do not make hasty decisions! Think well about it, because what appears to be the longest seemingly does not have to be.
The answer to the puzzle is on the next page.