Tag Archives: probability puzzles

Solution to Puzzle #67: Lab Rat On The Run

Posted on July 20, 2014 by Alok Goyal

I got many answers to this puzzle, and mostly all correct. This was a relatively simple puzzle for those who know algebra and probability, I do not know any way to do this one without them, and hence the younger … Continue reading →

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Puzzle #67: Lab Rat on the Run

Posted on July 12, 2014 by Alok Goyal

Very nice probability puzzle…though involves basic knowledge of probability and algebra. Found this again on http://www.midcipher.com. Consider a lab rat in a maze. There are four paths that can be taken with equal probability. Path A leads to exit in … Continue reading →

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Solution to Puzzle #60: Hats and Survival

Posted on May 4, 2014 by Alok Goyal

I got a few correct answer, the first one came from Akash Tayal from New Jersey. Well done! Am taking the liberty of reproducing his answer directly: Out of total 8 permutations, There are 6 ways that the cap colors … Continue reading →

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Puzzle #60: Hats and Survival

Posted on April 26, 2014 by Alok Goyal

I just heard this puzzle 15 minutes back at Alok Mittal’s Mathematical Circles where he gave this puzzle to all the children. Great puzzle – will encourage all children as well as adults to try this. There is an unlimited … Continue reading →

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Solution to Puzzle #43: The Triangular Duel

Posted on December 14, 2013 by Alok Goyal

This is the best response to a puzzle in recent times – thanks everyone! This was a slightly difficult question, the first correct answer for the first part came from Girish Tutakne again. Only one fully correct answer came from … Continue reading →

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Solution to Puzzle #40: White-Tailed Cats

Posted on November 23, 2013 by Alok Goyal

Two children sent me correct answers this time. Like last time, Shruti Mittal (from Mumbai) was the first one to send me a correct answer, and Danny Mittal (from Virginia, USA) also sent me a correct answer. Very well done! … Continue reading →

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Puzzle #8: Maximizing the Odds

Posted on March 17, 2013 by Alok Goyal

Here is a cute problem given to me by a friend, who mentioned that this was part of the Martin Gardner collection. There are two identical urns, and there are 50 identical red balls and 50 identical white balls. All … Continue reading →

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