Monthly Archives: November 2015

Puzzle #122: Sparrows on Trees

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

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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Puzzle #121: Spider and The Fly

This is a puzzle whose variations many people would have done already. Yet, I found this to be very nice and not as simple as it may seem at first sight. I picked this from a Martin Garder book again … Continue reading

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Solution to Puzzle #119: A Prime Cryptarithm

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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Puzzle #120: The Efficient Electrician

This is a gem of a puzzle – read it this morning in the book Mathematical Puzzles and Diversions by Martin Gardner. I have had many of the Martin Gardner books for ages now, but overtime I open these books, … Continue reading

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Solution to Puzzle #118: Rotating Disk

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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