Five Doors, Four Traps, Three Hints, Two Colors, One Chance To Escape
Riddle: There are five doors in front of you in the following order: black, blue, black, black, blue. Only one door will lead you to freedom, and you only have one chance to pick it. Assuming that all three hints are true, can you pick the correct door? 1) The correct door is black. 2) The correct door is not next to the leftmost or the rightmost door. 3) The correct door is not in the middle.
Answer: The leftmost door is the correct door. There are only three black doors, so it's one of them (we can eliminate doors two and five because they are blue and not black). The fourth door should be eliminated next because it's next to the rightmost door, which contradicts the second hint (we can't eliminate the first door because it's not correct to say that the leftmost door is next to itself). And the middle door is a trap, too. Therefore, the first door is the best choice.
Source: https://www.riddles.com/index.php/11476
