Author Archives: Alok Goyal

Puzzle #126: The Tricky Square Root

Posted on January 2, 2016 by Alok Goyal

Here is another nice puzzle I saw on brilliant.org The figure states it all…Happy rooting!

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Solution to Puzzle #124: Add the Numbers

Posted on January 2, 2016 by Alok Goyal

Lot of correct answers to the puzzle – the ones who sent the correct answer include Siddharth Mulherkar (good to see you on the blog!), Sandeep Singhal, Ritesh Banglani, Aditya, Pratik Poddar, Suman Saraf, Karan Sharma (my nephew who gave … Continue reading →

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Puzzle #125: Test Your Creativity

Posted on December 26, 2015 by Alok Goyal

Here is a wonderful small teaser I got from the site brilliant.org. I have seen at least two solutions to this puzzle, so try your creativity, there might be more. Look at the equation 1     4     … Continue reading →

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Solution to Puzzle #123: Heavier or Lighter Weight

Posted on December 26, 2015 by Alok Goyal

Apologies for not being able to send the answer last weekend. I got many correct answers for this one, and people sent different correct answers. Ones who sent correct answers include Pratik Poddar, Akash Tayal, Sandeep Singhal, Parag Dhanuka, Prakhar … Continue reading →

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Puzzle #124: Add the Numbers

Posted on December 13, 2015 by Alok Goyal

This is a gem of a puzzle that my nephew, Karan, gave to me yesterday. He and I came up with different ways to come to the answers, and there are probably many more ways. For all the possible 5 … Continue reading →

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Solution to Puzzle #122: Sparrows on Trees

Posted on December 13, 2015 by Alok Goyal

Wonderful puzzle and I got many correct answers. Ones to send the answers were Pratik Poddar, Prakhar Prakash, Suman Saraf, Karan Sharma and Girish Tutakne. The answer is that it can’t be done for 6 but can be done for … Continue reading →

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Puzzle #123: Heavier or Lighter Weight

Posted on December 6, 2015 by Alok Goyal

Found this intriguing question in the book Mathematical Circles (Russian Experience) by Dmitri Fomin, Sergey Genkin and Ilia Itenberg. I have not done this before, and do not know, therefore, how easy or difficult this is. There are 101 coins, and only … Continue reading →

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Solution to Puzzle #121: The Spider and the Fly

Posted on December 6, 2015 by Alok Goyal

This puzzle turned out to be more difficult than what I thought it was. There was only one correct answer – from Suman Saraf – very well done! The answer is 40 feet. There were a couple of people who … Continue reading →

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Puzzle #122: Sparrows on Trees

Posted on November 28, 2015 by Alok Goyal

This is a very cute puzzle borrowed from the book Mathematical Circles (Russian Experience) by Dmitri Fomin, Sergey Genkin and Ilia Itenberg. It is a wonderful book for middle graders. There are six sparrows sitting on six trees, one sparrow … Continue reading →

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Solution To Puzzle #120: The Efficient Electrician

Posted on November 28, 2015 by Alok Goyal

Apologies for a long absence, was traveling abroad on the last two weekends and hence could not post. This was a difficult puzzle, and I received answers from only 3 people – Pratik Poddar, Rahul Rane and Suman Saraf. Well … Continue reading →

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