What number when divided in half becomes zero?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

It was a dark stormy night and a couple were in a car driving madly to a city. The car broke down and the husband had to go get help from someone who spoke his language. He was afraid to leave his wife alone in the car so he locked the car before leaving. When he came back, the car was in the same state as he had left it but his wife was dead, there was blood on the floor and there was a stranger in the car. What happened?

What does this rebus riddle means ?

How many Watermelons are there in the below picture?

What building has the most stories?

What is 3/7 chicken, 2/3 cat and 2/4 goat?