Tricky riddles

If an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?

How many apples can you put in an empty box?

What is it that when you take away the whole, you still have some left over?

A murdered is condemned to death. He has to choose between three rooms. The first is full of raging fires, the second is full of assassins with loaded guns, and the third is full of lions that haven't eaten in 3 years. Which room is safest for him?

A bird, squirrel, and a monkey are running to the top of a coconut tree to get a banana - who will be the first to get to the banana?

What kinds of stones are never found in the ocean?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Forward I am heavy, but backward I am not. What am I?

The red house is on the white street, and the blue house is on the red street. Where is the white house?

The horse jumps over the king. Strangely there is absolutely no scratch on him. Can you explain, how is it possible?