220.--A LODGING-HOUSE DIFFICULTY.

From Amusements in Mathematics by Henry Ernest Dudeney.

The shortest possible way is to move the articles in the following order: Piano, bookcase, wardrobe, piano, cabinet, chest of drawers, piano, wardrobe, bookcase, cabinet, wardrobe, piano, chest of drawers, wardrobe, cabinet, bookcase, piano. Thus seventeen removals are necessary. The landlady could then move chest of drawers, wardrobe, and cabinet. Mr. Dobson did not mind the wardrobe and chest of drawers changing rooms so long as he secured the piano.

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220.--A LODGING-HOUSE DIFFICULTY.: Amusements in Mathematics by Henry Ernest Dudeney | amphi