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

 Bob and his brother (Posted on 2002-04-22)
You are to meet with two brothers. You know that one of them, named Bob, has a very important package for you. Unfortunately, you never saw Bob or his brother, and don't know who is who.

To make the matter worse, one of the brothers is a pathological liar who never tells the truth, while the other never lies. Not only do you not know which is the liar and which tells the truth, but also, you do not know wether Bob is the liar or not.

Upon meeting the brothers, you can ask one short question of either of the brothers (but not both) to establish with certainty which of the two is Bob. (It is possible to do this with a question of four to five words.)

 See The Solution Submitted by levik Rating: 3.5000 (16 votes)

 Subject Author Date solution Minerva 2007-01-28 14:57:41 another solution salil 2006-02-25 06:01:41 Thoughts salil 2006-02-25 05:55:49 re: If Bob is the liar Ken Haley 2004-09-22 00:01:19 If Bob is the liar Ryan 2004-05-03 12:45:19 No Subject Pieater 2004-03-05 12:05:19 re: *just read the solution* JennaBanenna 2003-10-29 00:51:29 *just read the solution* JennaBanenna 2003-10-29 00:48:02 re: solution Sam 2003-09-22 00:34:38 solution Daniel 2003-08-12 05:37:18 OH! zineera 2003-05-26 14:10:43 A long pondered question Cara 2003-05-08 10:30:11 3 word question Ken 2002-09-11 20:26:22 re: the answer levik 2002-08-27 03:47:57 the answer Kristina 2002-08-26 12:41:58 re: (After reading the solution) TomM 2002-08-04 03:47:29 (After reading the solution) Hazirah 2002-08-03 23:26:31 Ai... yaah! Hazirah 2002-08-03 23:19:39 try this too Carey 2002-05-28 00:18:37 no genius necessary Mike 2002-05-10 15:48:19 Solution Max Proskoff 2002-04-23 12:00:19

 Search: Search body:
Forums (0)