This is used in Japan to test person's logical thinking in job interviews.

You need to get the whole bunch across the stream. The raft can hold 2 people.
However you can't leave;
Dad with the daughters
Mom with the boys
The prisoner with anyone in the family without the cop.

Only mom,dad and the cop can move the raft

Push the round button to start

click the ppl to move them and the sticks to move the raft