The fox, the hen and the farmer.

Brainteaser Answer 2:

“The man takes the chicken across and then goes back for the fox. He can’t leave the fox and chicken together so when he drops the fox off, he picks up the chicken. He then goes back for the corn. He can’t leave the corn and the chicken together so when he picks up the corn, he drops off the chicken. When the corn is safely with the fox on the right side of the river, he goes to collect the chicken.”