The following riddle comes by Edouard Lucas, a 19th century French mathematician, who conceived other puzzles and [checks notes] died after a waiter dropped crockery on him.
Each day at noon a ship leaves La Harve for New York City. At the same time, a ship leaves New York City for La Harve and travels the same route in the opposite direction.
The trip lasts 7 days and 7 nights.
How many ships will you pass on your journey? Show graphically, if possible.
Answer, posted 1.23.25
15. 13 en route, plus one in each harbor.

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