All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Logic > Liars and Knights
Ask for help (Posted on 2005-07-05) Difficulty: 1 of 5
You are on a treasure hunt, wondering where the "Truth Treasure" is buried. You have no idea where it is buried, so you go Truth Town (made up of only Liars and Knights) because it is famous for holding the treasure's secret location.

When you enter the city, you see two twins and they know each other's types, but you don't. One twin says "(Exactly) one of us is a Knight..." and the other twin says "...and (exactly) one of us is a Liar." You can only ask one question and only to one person. You only care about where the treasure is kept, and obviously a liar would give you a wrong answer, so what should you do?

No Solution Yet Submitted by Gamer    
Rating: 3.4444 (9 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(5): Solution - WRONG ANSWER, NEW PUZZLE | Comment 9 of 41 |
(In reply to re(4): Solution - WRONG ANSWER, NEW PUZZLE by Penny)

Actually asking one twin what the other one will say doesn't work, because Twin A could always say that Twin B's response is going to be "I'm a Liar, so why are you asking me ?", or "It may or may not be at location x."

Fletch has the right answer: ask either twin to give you a location that does NOT contain the treasure.   




Edited on July 5, 2005, 3:20 pm
  Posted by Penny on 2005-07-05 15:18:02

Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information