Friday, January 18, 2008
I Love Logic Puzzles
There are two daughters, a mother, two sons, a father, a policeman and a prisoner on one side of a river. They need to get across. There is a ferry which will transport only two people at one time across the river, but:
- The father cannot be with either daughter without their mother,
- The mother cannot be with either son without their father,
- The prisoner cannot be with any member of the family (sons, daughters, mother, father) without the policeman.
- Only the father, mother and the policeman can run the ferry.
Either the mother, father or policeman is going to be the first across the river. It's not the mother, because then the father would be alone with at least one daughter. It's not the father, because at least the mother would be alone with at least one son. Therefore, it must be the policeman.
I've tried green tea, and I think it's foul.
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