Tag Archives: logic puzzles

Puzzle #194: Adjacent Cells On a Chessboard

This is another beauty of a puzzle from A Moscow Math Circle: Week by Week Problems by Sergey Dorichenko. The numbers from 1 to 64 have been placed in each square on a chessboard such that each number appears exactly … Continue reading

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Solution to Puzzle #191: 1×4 Rectangular Stone Plates

This was one of my favorite puzzles, though slightly difficult. Unfortunately I got only one correct answer this time, from Suman Saraf. Well done Suman! The answer is “no”. Look at the unusual coloring of the 10×10 board above. Please … Continue reading

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Solution to Puzzle #190: Escalator Race

This was a tricky puzzle – I received two correct answers, one from Prakhar and another one from Suman Saraf. Thank you both! Answer is that they will reach at the same time, provided certain conditions are met, see the … Continue reading

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Puzzle #191: 1×4 Rectangular Stone Plates

This is a gem of a puzzle from A Moscow Math Circle, Week by Week Problem Sets by Sergey Dorichenko. Can a 10×10 square be paved with 1×4 rectangular stone plates? As always, please send your answers as comments within … Continue reading

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Solution to Puzzle #188: Jars and Paints

Apologies for late posting of the solution to this puzzle, but better late than never! This puzzle was similar to one of the first puzzles I posted (Milkman and the Three Jars –¬†https://alokgoyal1971.com/2013/02/03/puzzle-2-milkman-and-the-three-jars/). I received correct answers from Suman Saraf … Continue reading

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Puzzle #188: Jars and Paints

I will be taking a break from puzzles for the next two weekends after this post! My fascination with A Moscow Math Circle (Week by week Problem Sets) by Sergey Dorichenko continues. Here is another one from there. Each of … Continue reading

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Solution to Puzzle #186: 4×4 Grid

This was a simple puzzle, a classical application of the pigeon hole principle. I got correct answers from Deepak Goyal (my brother in NY), Mahi Saraf (as always) and Pratik Poddar (as always again). I am taking the liberty of … Continue reading

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