Questions tagged [cards]
For puzzles centered around playing cards. For questions about card games themselves, visit our sister site Board & Card Games Stack Exchange.
73
questions
9
votes
3answers
2k views
How to cheat at cards
I have a deck of 52 cards on the table in front of me, in random order, each one randomly facing either up or down. I place one joker at each end, each of these again randomly facing either up or down,...
-1
votes
3answers
207 views
Who is the liar?
Three friends are playing a game of memory, there are a total of 20 cards with 10 card pairs. They try to make the most pairs in a row, after everyone had a turn they make the following statements:
...
38
votes
4answers
3k views
Multilayer Image Steganography
Alice, Bob, Carol, and Dan are playing a card game. After they all show their cards, Bob notes that by exchanging two cards the order of the players would be reversed; that is, the player with the ...
2
votes
4answers
1k views
4 player card game, who has advantage? [closed]
Edit for "off topic" "correction".
I don't know why this question was considered "off topic". It seemed to draw a lot of attention. The "puzzle" was to figure out which person has the advantage ...
4
votes
1answer
327 views
Mathematical probability with cards
A box contains 900 cards enumerated from 100 to 999 (Each number appears once and just in one card). I took some random cards without looking at them and calculated the additions of the digits in each ...
6
votes
2answers
540 views
Solitaire Puzzle
This one shouldn't be too hard.
Preparation stage: Take a shuffled deck of standard playing cards and deal 13 face-down piles of 4 cards each. Pick up each pile, arrange the order of the cards ...
7
votes
2answers
833 views
Cooperative guessing against an evil god
Following this: Cooperative guessing game:
A standard deck of 52 cards is shuffled and split into two piles of 26 cards each.
Two players cooperate, they must score as many tricks as possible.
The ...
13
votes
4answers
1k views
Cooperative guessing game
A standard deck of 52 cards is shuffled and split into two piles of 26 cards each.
Two players cooperate, they must score as many tricks as possible.
The first player draw 5 cards from the first pile, ...
7
votes
2answers
1k views
The Great Houdini's awesome card guessing trick (3)
The Great Houdini is performing again! Houdini has built up lots of reputation by showing his great card guessing tricks in [predecessor puzzle-1] and in [predecessor puzzle-2]. Everybody wants to see ...
7
votes
5answers
1k views
The Great Houdini's awesome card guessing trick (2)
The Great Houdini is performing again! Everybody wants to see the famous magician and the magic show is sold out. Today Houdini shows the following sophisticated trick:
A guy from the audience ...
5
votes
3answers
1k views
The Great Houdini's awesome card guessing trick (1)
The Great Houdini is performing again!
A guy from the audience arbitrarily chooses $52$ cards from a huge stack.
He shuffles the cards and announces to Houdini that there are $a$ spades, $b$ hearts, $...
11
votes
2answers
1k views
The Fitch Cheney Card Trick Extended
First, here is the original question which was also discussed here in Puzzling Beta:
This is a two-person card trick. At the initial stage, the magician leaves the room. The magician's assistant ...
16
votes
8answers
2k views
Rigged casino that prevents pairs
This question is still active as the answer from @Sleafar has just arrived. Not yet solved.
Scenario
The heads of 3 top terrorist organisations are planning to play an extremely high-stake poker ...
43
votes
5answers
30k views
A five card trick - How does it work?
At a party last night, my friends Alice and Bob did a magic trick. Any ideas how it worked?
Alice shuffled a pack of cards, and asked me to take five. I looked at them. She put the rest of the pack ...
4
votes
3answers
1k views
A game of Green Jack
NB: This is based on a puzzle over at BrainBashers.com.
The setup
You and a friend play a card game called Green Jack. The deck consists of 16 cards, divided into 4 cards in 4 colors (standard ...
-2
votes
5answers
4k views
How many Questions will you need to Guess the Card?
Suppose your friend grabs a random card from a deck. Now you can ask questions about that card. You can only ask yes/no and greater/less than questions. How many questions do you need to determine the ...
-1
votes
3answers
988 views
Inheritance by cards [duplicate]
An old farmer passes away in his sleep. After a suitable period of mourning, his three sons find their father's will in his study.
Amongst other, simpler bequests is the following:
"I wish my small ...
11
votes
5answers
2k views
Sorting cards using max 3 stacks
You have a stack of N cards numbered from 1 to N in random order.
You want to sort the cards in ascending order using the following procedure:
Your initial stack is stack 1.
You distribute the cards ...
9
votes
3answers
944 views
Hidden Message: Hidden in The Cards
The image below carry a hidden message. The image alone is not enough, you'll need to use the hints to uncover the hidden message. All the information needed to solve the puzzle is already given (as ...
10
votes
2answers
2k views
Two Card Probability Problem
I came across this puzzle somewhere on the interwebs. Has stumped me for an answer for quite sometime. Helpplease?
Someone picks, at their will, two cards from a deck of cards. The
cards have ...
9
votes
2answers
216 views
What are the odds that there is no solution on a given Set board?
I was playing a game of Set with a group. We had the usual twelve cards out and all agreed that there was no set. We then increased the number of cards to fifteen and were still unable to find a set....
7
votes
2answers
5k views
Are there any forms of patience or solitaire that can be solved by logic alone?
Single player games using a single deck of playing cards often called patience or solitaire, generally involve a degree of skill and luck to solve, with card shuffling ultimately being the deciding ...
4
votes
1answer
473 views
In the three-card monte, can a logical principle be applied to increase the odds?
Assuming the game is played without cheating, in the three-card monte, can a logical approach increase the player's chance of beating the house?
At first glance it would seem to be unlikely but a ...
