Vamsi Pavan’s Place

For Question
The idea is to reduce the number of participants (greedy pirates) and see what happens in that case and start reasoning based on that. One more thing to note here is that a pirate would accept a proposal only if he knows that in case he would not accept the proposal, he would get […]

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There are 5 pirates, all of them being equally greedy. They have varied number of years of experience. Say for convenience sake 5, 4, 3, 2 and 1. They find a booty of 1000 gold coins which they want to split amongst themselves. Everyone being greedy, wants the most for themselves. So they device a […]

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For Question
Since there are 5 cards, at least two will have to be of same suite. So
I keep one of them and pass the other one as the first card. This way
the second guy will know the suite.
With the three remaining cards
that needs to be passed on, I will establish an absolute ordering
between them (breaking […]

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Two prisoners were sentenced to death by King Xuan of Zhou and were
kept in two different inaccessible cells. They were to be put to the
gallows the day after. However, King Xuan wanted to give them a last
chance. Since he was very fond of riddles, he came up with one for the
prisoners which if they solved, […]

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Sheila and He-Man are twins; Sheila is the OLDER twin. Assume they were born immediately
after each other, an infinitesimally small - but nonzero - amount of time apart. During
one year in the course of their lives, Sheila celebrates her birthday two days AFTER
He-Man does. How is this possible?
Bonus: What is the maximum amount […]

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Four
men are lined up on some steps. They are all facing in the same
direction. A wall seperates the fourth man from the other three. So to summarise :-
Man 1 can see men 2 and 3. Man 2 can see man 3. Man 3 can see none of the others. Man 4 can see none of […]

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There are 9 coins. Out of which one is odd one i.e weight is less or more. How many iterations of weighing are required to find odd coin?
Try yourself first and finally, Select all to know the answer.
Answer
It is always possible to find odd coin in 3 weighings and to tell whether the odd coin […]

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Question : The grand master takes a set of 8 stamps, 4 red and 4 green, known to the logicians, and loosely affixes two to the forehead of each logician so that each logician can see all the other stamps except those 2 in the moderator’s pocket and the two on her own head. He […]

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Question : The two losing masters wanted a riposte, so the grand master showed them 5 hats, two white and three black. Then he said: “I will turn off the light and put a hat on each of your heads and hide the other hats. When I turn on the light you will have equal […]

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Question : Three masters of logic wanted to find out who was the wisest one. So they invited the grand master, who took them into a dark room and said: “I will paint each one of you a red or a blue dot on your forehead. When you walk out and you see at least […]

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