A man owned a Fox, a Duck, and a bag of corn. One day he was on the bank of a river where there was a boat only large enough for him to cross with one of his possessions.
If he left the fox and duck alone, the fox would eat the duck. If he left the duck and the corn alone. the duck would eat the corn. How did he get safely across the river with all three of his possessions?
1st trip : Man + Duck ..> man comes back alone==>leaves duck on the other side
2nd trip: Man + fox....> leave fox and take duck back
3rd trip: Man + Corn ==> Leaves the Duck and take the corn and leave it with the fox on the other side.
4th trip :Man + Duck ==> Now all the man and his possessions are on the other side of the river.