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Six Villages

Math brain teasers require computations to solve.

 

Puzzle ID:#44101
Fun:*** (2.39)
Difficulty:**** (3.45)
Category:Math
Submitted By:javaguru*us**
Corrected By:javaguru

 

 

 



There are six villages along the coast of the only perfectly round island in the known universe. The villages are evenly distributed along the coastline so that the distance between any two neighboring coastal villages is always the same. There is an absolutely straight path through the jungle connecting every pair of villages. These paths create thirteen crossings in the interior of the island, one of which is in the middle of the island where paths from every village meet.

The island has a strange courtship custom. Before a father will give permission for his daughter to marry, her suitor must bring the father a fish each day until he has traveled by every route from his village to the father's village. The young man only travels along routes where he is always getting closer to his destination. The young man may visit other villages along the way.

On April first a father's three sons come to tell him of their intent to woe a bride, each from a different village. The brides' villages are the first three villages encountered when traveling clockwise around the island.

If the sons begin their courtship today and the couples are married on the day following each son's last trip, what are the three wedding dates?

Bonus Question: If the coastline of the island is ten miles long, how long is the longest route that any of the sons takes to reach their betrothed's village?

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Hint

To find the number of routes, start from the son's village and move to the farthest away village or crossing from the bride's village he could travel to that hasn't been visited. Record the number of routes to this village or crossing. Keep repeating this, marking the number of routes to each village or crossing along the path until reaching his destination.
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