# The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

Message body

 Emoticons View more Emoticons
Options
HTML is OFF
BBCode is ON
Smilies are ON
 Disable BBCode in this post Disable Smilies in this post

 All times are GMT
 Jump to: Select a forum Puzzles and Games----------------Grey Labyrinth PuzzlesVisitor Submitted PuzzlesVisitor GamesMafia Games Miscellaneous----------------Off-TopicVisitor Submitted NewsScience, Art, and CulturePoll Tournaments Administration----------------Grey Labyrinth NewsFeature Requests / Site Problems
 Topic review
Author Message
Amy
Posted: Mon Nov 01, 1999 9:49 pm    Post subject: 1

I'll always say 50%, since I won't remember the parameters of the puzzle.
Ghost Post
Posted: Fri Oct 29, 1999 7:11 am    Post subject: 0

On sunday I flipped some coins.

If I flipped one coin, I'll only ask you on monday what the odds are that one coin came up heads.

If I flipped two coins, I'll ask you on monday and tuesday what the odds are that one coin came up heads.

You have a very bad memory, never know what day it is, and wont remember if you've been asked before. In fact, you'll barely remember the question that I just asked you, let alone something that happened many hours ago.

Being a strong puzzler, how would you answer the question? What are the odds that one of the coins I flipped came up heads?

Nick
Ghost Post
Posted: Wed Oct 27, 1999 10:52 pm    Post subject: -1

Actually, the problem stated that they asked her what the probability was that the coin came up heads.

If you say that I asked you what the probability was, you can answer either .5 or 1, depending on when you believe my time reference dealt with.
Ghost Post
Posted: Mon Oct 25, 1999 10:02 pm    Post subject: -2

The question asks what the probabilty WAS that the coin came up heads. If i flip a coin now and look at the outcome, the probablity that it came up heads was still 50%, even after the coin flip.
Brillo
Posted: Mon Oct 25, 1999 9:22 pm    Post subject: -3