All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info
Home > Logic
Logic problems. The solution to these problems does not usually require a lot of math, but will take some thinking until you find the right approach.
Sub-Categories (All Problem Categories)
> Liars and Knights> Weights and Scales
Each resident of Dot-town carries a red or blue dot on his (or her) forehead, but if he ever figures out what color it is he kills himself. Each day the residents gather; one day a stranger comes and tells them something—anything—non-trivial about the number of blue dots. Prove that eventually every resident kills himself.

Comment: “Non-trivial” means here that there is some number of blue dots for which the statement would not have been true.

(No Solution Yet, 1 Comments) Submitted on 2017-04-20 by Ady TZIDON   
Page 1 of 40   next >>    
Difficulty: 3 of 5Names in Boxes | Rating: 3.75
Posted on 2017-04-09 by Ady TZIDON (No Solution Yet, 10 Comments)
Difficulty: 4 of 5Murder in the Castle |
Posted on 2017-03-30 by ollie (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Leave no stone unturned | Rating: 4.00
Posted on 2017-03-19 by Ady TZIDON (Solution Posted, 5 Comments)
Difficulty: 2 of 5An easy whodunit | Rating: 3.50
Posted on 2017-03-08 by Ady TZIDON (Solution Posted, 8 Comments)
Difficulty: 3 of 5Off and On | Rating: 3.00
Posted on 2017-01-29 by Charlie (Solution Posted, 1 Comments)
Difficulty: 1 of 5Beginning of the Month | Rating: 5.00
Posted on 2017-01-09 by Charlie (Solution Posted, 2 Comments)
Difficulty: 3 of 5A's, B's, C's and D's | Rating: 3.00
Posted on 2016-12-30 by Charlie (Solution Posted, 1 Comments)
Difficulty: 3 of 5Who discovered the secret? |
Posted on 2016-12-27 by ollie (No Solution Yet, 4 Comments)
Difficulty: 3 of 5Traveling with Luggage | Rating: 3.00
Posted on 2016-12-15 by Brian Smith (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Your conclusion requested | Rating: 3.67
Posted on 2016-11-03 by Ady TZIDON (No Solution Yet, 9 Comments)
Difficulty: 3 of 5Why not marry? |
Posted on 2016-10-19 by Ady TZIDON (Solution Posted, 6 Comments)
Difficulty: 3 of 5Mismatch Muse |
Posted on 2016-10-18 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5Bridge Cross Baffle |
Posted on 2016-10-10 by K Sengupta (No Solution Yet, 3 Comments)
Difficulty: 1 of 5True Statement Settlement | Rating: 3.50
Posted on 2016-10-06 by K Sengupta (No Solution Yet, 2 Comments)
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 (1)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information