Spoiler forSpoiler for
Jump to content
|Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.
Of course, you can also enjoy our collection of amazing optical illusions and cool math games.
If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.
Thanks and enjoy the Den :-)
Brainy Binary hasn't added any friends yet.
Posted by Brainy Binary on 17 May 2014 - 03:20 PM
Spoiler forDoes this have to do with the deck being brought back into its original order (assuming perfect shuffling) after so many shuffles? If you were skilled enough to "follow" a card and you knew where it started, you would have a pretty good chance of finding it.Spoiler forNegative..the cards randomizes well. The no. of shuffling is not controlled..If it is a new deck from a wrapped box (where the suits are supposed to be in order - A-K (Hearts) , A-K(Diamonds) ,A-K(Spades),A-K(Clubs), Jokers removed) it is much easier to follow.
But the deck in OP is not brand new so you are skilled enough ..
1. Memorize the initial positions of individual cards. (When exposing the cards)
2. Cut the deck 26-26 to shuffle one right over one left card all the time.
3. Follow the resulting new position of individual cards every shuffle.
4. Spread the deck of known positions of individual cards and watch
which card was drawn. (not even a talent)
It is the Queen of Diamond!
Posted by Brainy Binary on 09 February 2014 - 06:45 AM
Spoiler for@plasmid : Thanks for the solution..That is pure lateral thought with dexterity!The scale reads the weight 2 times only with the following assumptions:1. the scale has on off button2. the spinning coins do not collide with each other3. the coins do not fall off or bumps on tray edge4. the the tray has enough flat surface5. the coins that stop spinning did not remain on its edge6. the coin stop spinning at the same time with another coin7. the spinning (left/right) magnetized coin on existing magneticfield around the scale has no effect on its weight?..with uncertainty but it might work.Hint : The 3 weighing solution is very easy..
Posted by Brainy Binary on 01 July 2013 - 08:13 AM
[S] 8 if no "." , 9 if no "1" ,6 if no "0" , 5 if no ". ,1 ,0"? I prese 8-9-6 [S]
Community Forum Software by IP.Board 3.4.6
Licensed to: BrainDen