Five houses in a row are painted distinct colors: Red, Blue, Green, Yellow, and White. The Green house is directly to the right of the Red house. The White house is at one of the ends. The Yellow house is not next to the Blue house. If the Blue house is in the middle (3rd position), what color is the 1st house on the left?
White
Blue is 3rd. Green is right of Red, so Red-Green must be adjacent pairs (either 1-2 or 4-5). Since Blue is 3rd and Yellow cannot touch Blue, Yellow must be at an end, but White is also at an end. Thus White and Yellow occupy 1 and 5. If White is 1, Red-Green is 4-5, Yellow is 2. Let's verify: White(1), Yellow(2), Blue(3), Red(4), Green(5).
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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