This is a test given to some job applicants in japan. The object is to get all the people from one side of the river to the other. here are the rules:
1.the father can not be with the daughters without the mother.
2.the mother an not be with the sons without the father.
3.the thief (black stripes) cant be with any family member without the cop.
4.only two people on the raft at a time.
5.only the mother,father, and cop can operate the raft (one needs to be on the raft for it to move)
when you click on the link, click on the blue circle in the right corner to play.click on the people to move them on and off the raft, click on the red circles to move the raft.
It took me a good 15 minutes to figure it out, and yes it can be done. good luck.
http://freeweb.siol.net/danej/riverIQGame.swf