# Tag Archives: logic puzzles

## 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

## 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

## Solution to Puzzle #184: The Sage and the Pharmacist

This was a different kind of puzzle, and I was happy to see the response. I got correct answers from Mahi Saraf, Sahaj Sharma (my nephew from Jaipur) and Pratik Poddar – well done all. Thanks again to Alok Mittal … Continue reading

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## Puzzle #184: The Sage and the Pharmacist

This is a beautiful riddle that I am borrowing from Alok Mittal’s Mathematical Circles class. In a far away land, it was known that if you drank poison, the only way to save yourself is to drink a stronger poison, … Continue reading

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## Solution to Puzzle #182: Weights and Balance Once More

This was a difficult puzzle. I got two correct answers – From Suman Saraf and Anahat (Prakhar’s son). Well done, or rather – excellent! Here is the solution for 5 weights – copying solution from Suman. let’s say the weights … Continue reading

## Puzzle #182: Weights and Balance Once More

Somehow puzzles on weights and balances just never end! I found this great one in Martin Gardner’s The Colossal Book of Short Puzzles and Problems. Five objects, no two the same weight, are to be ranked in order of increasing … Continue reading

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## Solution to Puzzle #180: White and Black Beans

This was one of the simpler puzzles and I got correct answers from many. This included Mahi Saraf, Anahat (Prakhar’s son), Vishal Poddar, Pratik Poddar and Praneeth. Well done all. The answer is “white”. I am borrowing the answer from … Continue reading