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Problematics | Books on a library shelf

India, Jan. 13 -- There are puzzles with multiple solutions, and there are puzzles with a unique solution that can be determined in multiple different ways. The English puzzler Henry Ernest Dudeney (1... Read More


Problematics | Who owns the zebra in 2025?

India, Jan. 6 -- Regular readers of Problematics need no introduction to Einstein puzzles, nor the reason why they are also called zebra puzzles. The benchmark puzzle of this form involves different p... Read More


Problematics | Stolen coins

India, Dec. 30 -- There is an old puzzle about three thieves who use different methods to calculate their respective shares from a set of mangoes, one after the other, but in the end up with an equal ... Read More


Problematics | The uncle and the grandmother

India, Dec. 9 -- One of the joys of writing this column has been to observe the way readers have solved my puzzles in their own innovative ways, which are often different from the way I would have sol... Read More


Problematics | Where Hitchcock meets Einstein

India, Dec. 2 -- If you have ever been to a film festival where a number of movies are playing simultaneously on different screens, the schedule may have sometimes forced you to miss a few you wanted ... Read More


Problematics | Rescue dog

India, Nov. 18 -- In the more than two years that Problematics has been running in HT, we have managed to set ourselves a template for the difficulty level of our puzzles. The puzzles are intended to ... Read More


Problematics | When couples bought and sold puzzles

India, Nov. 4 -- For more than a century, an English magazine called the Ladies' Diary, initially consisting mainly of recipes, soon started to include mathematical puzzles of varying levels of diffic... Read More