Math problem " Crossing the river - cannibals & missionaries?!
Question: 3 cannibals and 3 missionaries come to a river that they must cross. the boat will only hold 2 people at a time . if the cannibals ever outnumber the missionaries ,they will do what they are famous for doing.
How can all 3 cannibals and all 3 missionaries cross the river safely ?
PLEASE HELP ME and can you PLEASe tell me how you figure it out
THANKS IN ADVANCE
Answers: 3 cannibals and 3 missionaries come to a river that they must cross. the boat will only hold 2 people at a time . if the cannibals ever outnumber the missionaries ,they will do what they are famous for doing.
How can all 3 cannibals and all 3 missionaries cross the river safely ?
PLEASE HELP ME and can you PLEASe tell me how you figure it out
THANKS IN ADVANCE
Trip 1 - 2 cannibals.
Trip 2 - 1 cannibal comes back.
Trip 3 - 2 cannibals (leaving 3 missionaries on this bank).
Trip 4 - 1 cannibal comes back.
Trip 5 - 2 missionaries - leaves one of each on this side and 2 of each on the other side.
Trip 6 - 1 cannibal and 1 missionary come back (there are now 2 of each on this side and 1 of each across).
Trip 7 - the last 2 missionaries cross, leaving 2 cannibals on this side and three missionaries and one cannibal across.
The missionaries can now walk along while the cannibal goes back to get his mates.
-two cannibals will cross, one stays one comes back.
-Then a missionarie and the cannibal cross, the missionarie gets of and the cannibal goes back.
-Then another missionarie will cross with the canibal and get off, while the canibal comes back.
-The cannibal picks up the last missionarie and drops him off and comes back to get the last cannibal