Category Archives: Solution

Solution to Puzzle #119: A Prime Cryptarithm

Posted on November 10, 2015 by Alok Goyal

This was a slightly difficult problem for many people, though can be solved with some persistent trial and error. Girish Tutakne, Pradeep Hengavelli, Suman Saraf, Chandu Karan and Pooja Goyal+Arushi Goyal were the ones to send correct answers. I do … Continue reading →

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Solution to Puzzle #118: Rotating Disk

Posted on November 1, 2015 by Alok Goyal

This was a slightly difficult puzzle, and I got relatively few correct solutions. From Alok’s Mathematical Circles class, I know that several people were able to get the answer, that included Smiti Mittal (had a very innovative and simple answer) … Continue reading →

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Solution to Puzzle #117: Mr. Calendar

Posted on October 25, 2015 by Alok Goyal

Apologies for not posting last weekend, I was traveling on a short vacation! This was a relatively easy puzzle, many people sent me the correct answer. Folks who sent me the correct answer include Karan Sharma, Suman Saraf, Sanjeev Dugar, … Continue reading →

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Solution to Puzzle #116: The Magic Card Frame

Posted on October 11, 2015 by Alok Goyal

I got many correct answers for this puzzle as well and a very good response. People who sent correct answers included Chandu Karan, Divya, Suman Saraf (The most complete solution) and Pratik Poddar. I am reproducing the solutions from Suman, … Continue reading →

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Solution to Puzzle #115: The First Rabbit

Posted on October 6, 2015 by Alok Goyal

Thanks for an overwhelming response again to the rabbit puzzle. Anyone who responded, did so with the correct answer! Some people did not send any explanation, amongst those who did, I like the simplicity of the answer from Prakhar, Salil … Continue reading →

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Solution to Puzzle #114: 1978

Posted on September 27, 2015 by Alok Goyal

This was a relatively simple puzzle and the number of people who sent correct answers was overwhelming. I will try to capture as many as I can – Ishir Gupta (only one not to use algebra), Pratik Poddar, Suman Saraf, … Continue reading →

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Solution to Puzzle #113: Magic Arrangement of Cards

Posted on September 21, 2015 by Alok Goyal

I got an overwhelming response to this puzzle – so many that putting down the names of correct answers is not feasible. This was also the best viewership of the blog for any week since I started this blog – … Continue reading →

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Solution to Puzzle #112: Weights and Balance Revisited

Posted on September 12, 2015 by Alok Goyal

As I mentioned in the question, this is an age old problem, but I was still intrigued by the twist provided to this puzzle by a colleague’s daughter. Many people gave a correct answer to the first two parts of … Continue reading →

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Solution to Puzzle #111: Soldiers In a Line

Posted on September 6, 2015 by Alok Goyal

This was a difficult puzzle. I had trouble understanding the answer even when it was given to me, and had to go to Alok Mittal for rescue. Siddharth Goel (Founder, Adstrak) gave some useful links for this puzzle and Sumar … 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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