Logic Riddles

Question: A murderer 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?

Question: A man drives from San Francisco to Honolulu without any of his tires.

How does he do this?

Question: How much dirt is in a hole that has a radius of 33.2 meters and a height of 78.2 meters?

Question: What happens when you throw a blue rock into the yellow sea?

Question: Tom wants to send Sally an expensive ring through the mail because they live thousands of miles apart. The only problem is that everything sent through the mail is stolen unless there is a lock put on it. Both Tom and Sally have plenty of locks and keys but they don't have any of the same locks or keys.

How can Tom send Sally the ring without it getting stolen?