Three missionaries and three cannibals want to get to the other side of a river. There is a small boat, which can fit only two. To prevent a tragedy, there can never be more cannibals than missionaries together.
Work out the combinations necessary to get them all safely to the other side. The solution is going to be something like:
1 missionary and 1 cannibal there, 1 missionary back;
1 missionary and 1 cannibal there .....
And so on. Solution will be given tomorrow morning.
Tomorrow morning: Answer is here.