Monthly Archives: September 2013

Puzzle #33: Running in Circles

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

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

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

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?

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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Solution to Puzzle #30: Red, White and Blue Weights

This was a relatively difficult puzzle for many children, and I did not get too many responses. The only correct answer amongst the younger lot came from Smiti Mittal – congrats Smiti! I also got a correct answer from Ruchir, … Continue reading

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Puzzle #30: Red, White and Blue Weights

Back to weights – Found this very nice puzzle in Mathematical Circus, by Martin Gardner (Chapter 11, Problem #6). This one was originally created by Paul Curry, who was also an amateur magician. You have six weights. One pair is … Continue reading

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