There is a woman who needs to get three things across a waterfall corn feed, a chicken, and a fox but she can only take them one at a time. And the fox can't stay with the chicken because he will eat the chicken and the chicken can't stay with the corn feed because it will eat the corn feed. How does she get them across?

She brings the fox and corn first and goes back for the chicken?

The woman carries the chicken over and leaves it there. She comes back and gets the fox, leaves it there, and takes the chicken with her on the return trip. She leaves the chicken and brings the corn feed across, leaving it with the fox, then goes back for the chicken.