Author Archives: Alok Goyal

Solution to Puzzle #35: Staying Alive in a Desert

Posted on October 20, 2013 by Alok Goyal

I got a lot of responses to this puzzle, one of the highest responses I have had ever. Also, most of the answers were correct, and had a similar theme. The answer does not necessarily require a video, and hence … Continue reading →

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Puzzle #35: Staying Alive in a Desert

Posted on October 14, 2013 by Alok Goyal

I saw this puzzle at the recently organized TiE Conference in Delhi – so thanks to Priya who posted this puzzle. Here it goes: You are a traveler in a desert full of mosquitoes. You know that if you get … Continue reading →

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Solution to Puzzle #34: Another Set of Magic Squares

Posted on October 14, 2013 by Alok Goyal

I received only two correct answers, from Tishyaa Chaudhry and Smiti Mittal – both brilliant kids – well done! While brute force can help you arrive at the answer, the fun is in finding a method. The complete answer is … Continue reading →

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Puzzle #34: Another Set of Magic Squares

Posted on October 5, 2013 by Alok Goyal

I found this very nice set of number puzzles on the net on the following site – http://www.mathsphere.co.uk. The puzzle looks pretty innocuous, and by sheer brute and force, you can try to solve it, though it is not very … Continue reading →

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Solution to Puzzle #33: Running in Circles

Posted on October 5, 2013 by Alok Goyal

Thanks again to Maneesh Dube for sending me this puzzle. Many people responded to this, however only a few got back to me with a complete answer. The ones who answered completely are Vikas Jangra and Ruchir Godura. Many others, … Continue reading →

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Puzzle #33: Running in Circles

Posted on September 28, 2013 by Alok Goyal

This is a very nice puzzle from a close friend – Maneesh Dube, based out of New Jersey. Maneesh and his daughter, Nandini, are running around a circular park. Maneesh is running faster than Nandini. How much faster is Maneesh … Continue reading →

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Solution to Puzzle #32: Removing the Coins

Posted on September 28, 2013 by Alok Goyal

This was a relatively simple puzzle, though surprisingly I got very few answers – I guess people do not like geometric puzzles as much. I got three correct answers this time, including the one from Arushi (my 6 year old) … Continue reading →

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Puzzle #32: Removing the Coins

Posted on September 23, 2013 by Alok Goyal

This is a very nice geometry puzzle taken from the Mathematical Circus, by Martin Gardner. The puzzle is originally devised by Kobon Fujimura, a leading puzzler from Japan. Look at the figure below which has 10 coins arranged as an … Continue reading →

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Solution to Puzzle #31: Which Day Does Rahul Speak the Truth

Posted on September 23, 2013 by Alok Goyal

I got many answers to this puzzle, and there was a very good response. Most of you answered the puzzle correctly. The first ones I got correct were from Anku Jain and Sid Pareek. The correct answer is Tuesday. Here … Continue reading →

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Puzzle #31: Which Day Does Rahul Speak the Truth?

Posted on September 16, 2013 by Alok Goyal

This is a very cute puzzle which I read on the internet somewhere, but do not remember the source. In case anyone knows the source, please do let me know, I would love to credit the person. This is a … Continue reading →

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