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

Home > Logic > Liars and Knights
Neighbor Ponder (Posted on 2014-02-25) Difficulty: 3 of 5
When Kendra moved into her new house, four neighbors visited her with housewarming gifts. As she got to know them, Kendra realized that those who lived on the even side of the street – where house numbers are 2, 4, 6, 8 etc. – were the knights, who always spoke the truth while those who lived in the odd side – where house numbers are 1, 3, 5, 7 etc. – were the liars, who always spoke falsely.

The neighbor’s name, house number and the gifts are listed below, albeit not necessarily in that order:
Neighbor’s name: Bea, Celia, Daphne, Allison.
House numbers: #56,  #58,  #63,  #65
Gifts: cakes, salad, fruits, pilau.
Following are the statements made by each neighbor:

1. Celia lives in either #58 or #65.
2. Daphne does not live in either #56 or #65.

1. Bea and Daphne live on the same side of the street.
2. The woman who brought the salad does not live at #63 or #58.
3. Daphne does not live next door to me.

1. I live in either #56 or #65.
2. Either Allison or Bea brought the fruits.

1. I live either at #63 or #56.
2. The woman who lives in #65 brought the pilau.

Given that Bea is a knight, use the above statements to find the house number and the gift of each neighbor.

No Solution Yet Submitted by K Sengupta    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution Solution Comment 1 of 1

We're told Bea is a knight. 

Combining Bea's second statement with Daphne's first statement, we know that Daphne is a liar. 

Combining this knowledge with Celia's first statement, we know that Celia is a liar, and thus Allison is the other knight. 

From there it's pretty straightforward. 

Bea lives at 58 and brought salad.

Celia lives at 65 and brought pilau.

Daphne lives at 63 and brought fruits.

Allison lives at 56 and brought cakes.

  Posted by tomarken on 2014-02-25 14:25:15
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (4)
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

Copyright © 2002 - 2019 by Animus Pactum Consulting. All rights reserved. Privacy Information