Brain Teasers
Logic Problem Puzzle?
Mr. Puzzle has been coming home from the local watering hole a little bit the worse for wear. Mrs. Puzzle is becoming increasingly fed up with his behaviour.
When Mr. Puzzle arrived home one evening last week, his wife had left him in a bit of a dilemma. They have three bedrooms and they used them all from time to time. On each door Mrs. Puzzle had placed a sign and also another sign stating that only one of the three other statements was true and that was where Mrs. Puzzle was sleeping for that night. Of the other two rooms, one was empty and the other had the neighbours' highly strung Pit Bull Terrier - Bruty inside. Mr. Puzzle was very confused, having consumed a few too many that very evening and he stared blankly at each door.
Sign on Bedroom 1. Bedroom 3 is empty
Sign on Bedroom 2. Bruty is in here
Sign on Bedroom 3. Bedroom 2 is empty
Behind which door is his wife, where is the dog and which room is empty?
When Mr. Puzzle arrived home one evening last week, his wife had left him in a bit of a dilemma. They have three bedrooms and they used them all from time to time. On each door Mrs. Puzzle had placed a sign and also another sign stating that only one of the three other statements was true and that was where Mrs. Puzzle was sleeping for that night. Of the other two rooms, one was empty and the other had the neighbours' highly strung Pit Bull Terrier - Bruty inside. Mr. Puzzle was very confused, having consumed a few too many that very evening and he stared blankly at each door.
Sign on Bedroom 1. Bedroom 3 is empty
Sign on Bedroom 2. Bruty is in here
Sign on Bedroom 3. Bedroom 2 is empty
Behind which door is his wife, where is the dog and which room is empty?
Answer
Bedroom 1. DogBedroom 2. Empty
Bedroom 3. Wife
If the sign on Bedroom 1 were true this would mean the wife must be in Bedroom 1, but then Bedroom 3 would have to be empty and therefore Bruty would have to be in Bedroom 2. This would mean 2 true signs, so is incorrect.
The sign on Bedroom 2 must be incorrect, as if it were true Bruty would be in here, however, only the Bedroom sign where the wife is sleeping, is true. Therefore, this is incorrect too.
Therefore:
Bedroom 3 sign is true - So Mrs. Puzzle is in here.
Bedroom 2 sign is a lie - So Bruty, the dog, must be in Bedroom 1, and this room must be empty.
Bedroom 1 sign is a lie - Mrs Puzzle is in Bedroom 3
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