I am two-faced but bare only one, I have no legs but travel widely. Men spill much blood over me, kings leave there imprint on me. I have greatest power when given away, yet lust for me keeps me locked away.
A man went on a trip with a fox, a goose and a sack of corn. He came upon a stream which he had to cross and found a tiny boat to use to cross the stream. He could only take himself and one other - the fox, the goose, or the corn - one at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How does he get all safely over the stream?
Take the goose over first and come back. Then take the fox over and bring the goose back. Now take the corn over and come back alone to get the goose. Take the goose over and the job is done!
In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?
None. If their names are in the phone directory, they do not have unlisted phone numbers!