RIVER CROSSING PUZZLE - 3

SHE-GOAT, WOLF AND CABBAGE

A farmer returns from the market, where he bought a she-goat, a cabbage and a wolf (what a crazy market :-). On the way home he must cross a river. His boat is small and won't fit more than one of his purchases. He cannot leave the she-goat alone with the cabbage (because the she-goat would eat it), nor he can leave the she-goat alone with the wolf (because the she-goat would be eaten).

How can the farmer get everything on the other side in this river crossing puzzle?

Solution:

Take the she-goat to the other side.

Go back, take cabbage, unload it on the other side where you load the she-goat, go back and unload it.

Take the wolf to the other side where you unload it. Go back for the she-goat.

That's it.

RIVER CROSSING PUZZLE - 2

FAMILY

Parents with two children - a son and a daughter - came to a wide river. There was no bridge there. The only way to get to the other side was to ask a fisherman if he could lend them his boat. However, the boat could carry only one adult or two children.

How does the family get to the other side and return the boat to the fisherman?

Solution: 

First go the children.

Son comes back, and father goes on the other side to his daughter.

Then daughter goes back to pick her brother up and they both go to the other side to the father.

Son comes back to give the boat to mother who goes to the other side (to father and daughter).

Daughter jumps in and goes to her brother so they can both return to their parents.

Daughter gets off and son gives the boat back on the first side of the river to the fisherman, who goes on the other side.

There the daughter jumps in and goes to her brother to take him back to parents where she (where the whole family meets at last) returns the boat to the fisherman. 

RIVER CROSSING PUZZLE -1

CANNIBALS AND MISSIONARIES

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.

How could all of them get safely across the river?

Solution: 

1 cannibal and 1 missionary there, missionary back.

2 cannibals there, 1 cannibal back.

2 missionaries there, 1 missionary and 1 cannibal back.

2 missionaries there, 1 cannibal back. 

This one cannibal takes the remaining cannibals to the other side.