Monthly Archives: May 2015

Puzzle #103: Proof Without Trigonometry

This is a wonderful puzzle I found in the puzzle collection of The Guardian newspaper, the original source being Martin Gardner. The beauty of this puzzle is that one needs to use simple rules of geometry and we do not … Continue reading

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Solution to Puzzle #102: The Persistence Problem

This was a difficult puzzle, though I continue to be amazed how so many people solve them with such speed…my hats off to all the ones who solved this one. That includes Saurabh Aggarwal, Abhinav Jain, Akshay Joshi, Suman Saraf … Continue reading

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Puzzle #102: The Persistence Puzzle

This is yet another famous puzzle from the Martin Gardner collection. I was made aware of this one by my nephew, Karan Sharma – thank you! I have not looked up the answer to this one, so do not know … Continue reading

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Solution to Puzzle #101: Shortest Path Touching the X-axis

Thanks to Arunima and Amol again for contributing a wonderful puzzle. This is a famous puzzle called the Heron’s Shortest Distance Problem and has historical roots. The puzzle can be solved through calculus, but can be solved without any calculus … Continue reading

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Puzzle #101: Shortest Path Touching the X-Axis…

This is a beautiful puzzle initially sent to me a month back by Arunima, a friend from IIT Delhi now in Washington DC. The same puzzle was sent to me by another friend’s son, Amol Aggarwal, now doing his PhD … Continue reading

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Solution to Puzzle #100: The 100 Square Rug Puzzle

My apologies for vanishing after posting the prize puzzle – I was traveling for the last 3 weekends and hence did not have a chance to post the answer. Overwhelming response, and I am amazed by the abundance of brilliance … Continue reading

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