this is a classic
have done it many times
three missionaries and three cannibals need to cross a river in a boat that can hold only two people.the missionaries must be careful to never allow the cannibals to outnumber them on either shore. how can everyone cross the river?
yup this one is alll over the internet by different names...
There was a flash game i played once... :)
1-Two cannibals go
2-One cannibal returns
3-Again two cannibals go
4-One cannibal returns
5-Two missionaries go
6-One missionary and one cannibal returns
7-Two missionaries go
8-One cannibal returns
9-two cannibals go
10-one cannibal returns back
11-and finally two cannibals crosses the river.......