A farmer with a sack of Corn, a Chicken and a Fox across the river.

A farmer has to get a sack of corn, a chicken, and a fox across a river.
The farmer is only able to bring one of the above items along with him at a time.
The only problem is if he leaves the fox alone with the chicken,
the fox will eat the chicken,
and if he leaves the chicken along the corn sack,
then the chicken will eat the corn sack.
How does the farmer get all 3 items across safely ?


Answer : 
The farmer brings the chicken across.
Goes back and brings the fox across,
and brings the chicken back with him to the other side of the river
and drops off the chicken,
then he goes and brings the corn sack across,
 and finally he goes back for the chicken and brings it across.

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