Monthly Archives: August 2015

Puzzle #112: Weights and Balance Revisited

Posted on August 29, 2015 by Alok Goyal

This is a twist to a puzzle which has been around for a very long time. I have myself looked at this puzzle since I was a kid, but a twist (or a potential flaw) to the puzzle was recently pointed … Continue reading →

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Solution to Puzzle #110: Circular Dining Table

Posted on August 29, 2015 by Alok Goyal

This was a relatively easy puzzle and many people sent a correct answer. That included Siddhartha Goel, Suman Saraf, Pratik Poddar, Traveling Salesman (which I believe is a nick name), Narsimha Pai and Salil Panikkaveettil. The puzzle used a popular … Continue reading →

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Puzzle #111: Soldiers in a Line

Posted on August 23, 2015 by Alok Goyal

This is another beautiful puzzle that I got through my daughter (Anisha) and her friend (Abhiram), which they got in Alok Mittal’s Mathematical Circles class. In a line up of 10 soldiers, what is the least number of soldiers that … Continue reading →

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Solution to Puzzle #109: Fox in a Hole

Posted on August 23, 2015 by Alok Goyal

From this week, I am moving to a one-week shifted model, where I will publish the solution for puzzles posted 2 week back instead of one week back, this will give everyone two weeks to look at the puzzle just … Continue reading →

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Puzzle #110: Circular Dining Table

Posted on August 15, 2015 by Alok Goyal

I am leaving for a vacation, and hence not able to post the solution to the last week’s puzzle. In the meantime, here is another puzzle, will post the answers to both next week. This puzzle is courtesy Alok Mittal, … Continue reading →

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Puzzle #109: Fox in a Hole

Posted on August 8, 2015 by Alok Goyal

A beautiful logic puzzle that I found on Gurmeet’s puzzle collection, which he has attributed originally to K Rustan M Leino at Microsoft Research. Consider five holes in a line. One of them is occupied by a fox. Each night, … Continue reading →

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Solution to Puzzle #108: The Double Square Number Problem

Posted on August 8, 2015 by Alok Goyal

Apologies that I could not post the answer last weekend as I was traveling. I was overwhelmed by the number of answers i received for this puzzle – most of them correct. However, many people used spreadsheets or a small … Continue reading →

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