You have two buckets - one holds exactly 5 gallons and the other
3 gallons. How can you measure 4 gallons of water into the 5 gallon
(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)
A mile-long train is moving at sixty miles an hour when it reaches a
mile-long tunnel. How long does it take the entire train to pass
through the tunnel?
2 minutes (The back of the train would be at the beginning of the tunnel
after 1 minute, and would leave the end of the tunnel at the 2 minute