Five houses in a row are painted different colors: Red, Blue, Green, Yellow, and White. The Green house is immediately to the right of the Red house. The Yellow house is at one of the ends. The Blue house is somewhere to the left of the Red house. Which house is in the exact middle (the third house)?
Red house
Yellow is at an end. Since Blue is left of Red and Red is left of Green (Red-Green is a pair), we have a block of three: Blue ... Red-Green. Since Yellow is at an end, White must fill the remaining spot. Let's arrange: If Yellow is at the far left (1), Blue is 2, Red is 3, Green is 4, White is 5. Let's check rules: Green is right of Red (True), Yellow is at an end (True), Blue is left of Red (True). Thus, the Red house is in the exact middle (position 3).
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Hard. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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