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Le Monde puzzle [#1024]

October 10, 2017

The penultimate and appropriately somewhat Monty Hallesque Le Monde mathematical puzzle of the competition! A dresser with 5×5 drawers contains a single object in one of the 25 drawers. A player opens a drawer at random and, after each choice, the object moves at random to a drawer adjacent to its current location and the drawer […]

Le Monde puzzle [#1022 & #1023]

September 29, 2017

Another Le Monde mathematical puzzle where I could not find a solution by R programming (albeit one by cissors and papers was readily available!): An NT is a T whose head (—) is made of 3 50×50 squares and whose body (|) is made of N 50×50 squares.  What is the smallest possible side of […]

Le Monde puzzle [#1021]

September 17, 2017

A puzzling Le Monde mathematical puzzle for which I could find no answer in the allotted time!: A most democratic electoral system allows every voter to have at least one representative by having each of the N voters picking exactly m candidates among the M running candidates and setting the size n of the representative […]

Le Monde puzzle [#1020]

September 15, 2017

A collection of liars in this Le Monde mathematical puzzle: A circle of 16 liars and truth-tellers is such that everyone states that their immediate neighbours are both liars. How many liars can there be? A circle of 12 liars and truth-tellers is such that everyone state that their immediate neighbours are one liar plus […]

Le Monde puzzle [#1019]

September 7, 2017

A gamey (and verbose) Le Monde mathematical puzzle: A two-player game involves n+2 cards in a row, blue on one side and red on the other. Each player can pick any blue card among the n first ones and flip it plus both following ones. The game stops when no blue card is left to […]