A man came to a river with a bag of corn, a fox, and a duck. There was a boat in which he can ferry only one of the three things he had with him. He cannot leave the duck with the corn, nor the duck with the fox. How does he carry all three across?
First.....take the duck over
Come back and get the corn and carry it over, returning with the duck
Drop off the duck at the original point and pick up the fox and take him over
Come back wit the boat empty, pick up the duck ........ and you're finished !!!!
he takes the duck across first, then the fox, but takes the duck back. then he takes the corn across to the fox, then takes the duck across after.