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

Home > Logic > Liars and Knights
Knights, Liars, and Spies (Posted on 2022-02-12) Difficulty: 3 of 5
On a remote, mysterious island there are three types of people: Knights, who always tell the truth; Liars, who always lie and Spies, who may answer in any order that they think fit.

Lenny is visiting this island when he comes across three men. He knows that one of them is a knight, one is a liar and one is a spy. However, he doesn't know the exact identities of the three men.

Lenny is permitted to ask these three gentlemen precisely two yes-no questions. All the three men will answer each question, one at a time, with either a "yes" or "no" response.

How does Lenny determine the true types of these three men?

*** Try avoiding extraneous questions like "Is the sun shining?" or, "Is the earth flat?"

See The Solution Submitted by K Sengupta    
Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSpoilerKenny M2022-02-13 14:59:59
re(3): Question or ClarificationK Sengupta2022-02-13 13:01:59
re(2): Question or ClarificationKenny M2022-02-13 12:54:44
Hints/Tipsre: Question or ClarificationK Sengupta2022-02-13 12:43:24
QuestionQuestion or ClarificationKenny M2022-02-13 08:16:53
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (8)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information