Solutions

1. The man is very, very short and can only reach halfway up the elevator buttons. However, if it is raining then he will have his umbrella with him and can press the higher buttons with it.
2. The surgeon was his mother.
3. It was day time. Nowhere does it say it was night.
4. He recognized Adam and Eve as the only people without navels. Because they were not born of women, they had never had umbilical cords and therefore they never had navels. This one seems perfectly logical but it can sometimes spark fierce theological arguments
5. They were two of a set of triplets (or quadruplets, etc.). This puzzle stumps many people. They try outlandish solutions involving test-tube babies or surrogate mothers. Why does the brain search for complex solutions when there is a much simpler one available?
6. The man had hiccups. The barman recognized this from his speech and drew the gun in order to give him a shock. It worked and cured the hiccups--so the man no longer needed the water. This is a simple puzzle to state but a difficult one to solve. It is a perfect example of a seemingly irrational and incongruous situation having a simple and complete explanation. Amazingly this classic puzzle seems to work in different cultures and languages.
7. The third. Lions that haven't eaten in three years are dead.
8. Freeze them first. Take them out of the jugs and put the ice in the barrel. You will be able to tell which water came from which jug.
9. The answer is Charcoal.
10. Sure you can: Yesterday, Today, and Tomorrow!