Category Archives: Puzzles

Puzzle #69: CAT a Century!

Posted on July 27, 2014 by Alok Goyal

This is a wonderful 2-minute teaser I picked up from Martin Gardner’s “The Colossal Book of Short Puzzles and Problems”. In the end of the book he has a chapter titled “Twelve More Brain Teasers”, which has 12 problems he … Continue reading →

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Puzzle #68: Number At The Intersection

Posted on July 20, 2014 by Alok Goyal

This is a very nice, quick teaser I got from the site brilliant.org. Should be fun to do for the younger lot, no specific knowledge required for this one. Place integers from 1 to 9, once each, into the 9 … 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 #66: All The King’s Wine

Posted on July 12, 2014 by Alok Goyal

Got the most hits to the puzzle site this week for 2014…thanks! I got many correct answers, though the one I loved the most was from Anavi Baddepudi, a 10 year old from Singapore. From the answer, it seemed that she … Continue reading →

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Puzzle #66: All the King’s Wine

Posted on July 6, 2014 by Alok Goyal

A delightful puzzle, found this one on the site http://www.mindcipher.com. So there’s this king. Someone breaks into his wine cellar where he stores 1000 bottles of wine. This person proceeds to poison one of the 1000 bottles, but gets away … Continue reading →

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Puzzle #65: The On-Off Game

Posted on May 31, 2014 by Alok Goyal

This is a relatively common puzzle and available in many puzzle books. Interesting one, good to try with kids. There are 100 light switches, all of them are off. First, you walk by them, turning all of them on. Next, … Continue reading →

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Puzzle #64: Unique Country

Posted on May 24, 2014 by Alok Goyal

This is a very nice application of graph theory for children, a puzzle I picked up from the book “Mathematical Circles”, by Dmitri Fomin, Sergey Genkin and Ilia Itenberg. There is a unique country (lets call it Strangistan), where there are … Continue reading →

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Puzzle #63: The Funny Equation

Posted on May 17, 2014 by Alok Goyal

Great small numbers puzzle for children! I found this one in a new book that I bought last week “World’s Toughest Puzzles” by Charles Barry Townsend. Puzzles are not as tough as the name of the book suggests 🙂 One … Continue reading →

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Puzzle #62: How Much Did I Drink?

Posted on May 10, 2014 by Alok Goyal

This is another puzzle I picked up from Brilliant.org posted by Can Hou and the puzzle is originally from Oxford University interviews. I have a pint of orange juice. I drink half of it and then give it to you. … Continue reading →

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Puzzle #61: How Many Pearls

Posted on May 4, 2014 by Alok Goyal

This is a simple puzzle, and would love for children to try it! I picked this up from a new website recommended to me by my wife – Brilliant.org…has a great selection of puzzles. This specific puzzle was posted by … Continue reading →

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