Logic Riddles

Question: A rat is placed at the beginning of a maze and must make it to the end. There are four paths at the start that he has an equal chance of taking: path A takes 5 minutes and leads to the end, path B takes 8 minutes and leads to the start, path C takes 3 minutes and leads to the end, and path D takes 2 minutes and leads to the start.

What is the expected amount of time it will take for the rat to finish the maze?

Question: The doctor gives you three pills and tells you to take one every half hour. How long before you run out of pills?

Question: When I was 2 years old, my brother was half my age. Now I am 100 years old, how old is my brother?

Question: A lawyer has a brother who is a Catholic priest. The lawyer wants to be a priest as well but cannot. Why not?

Question: What is at the end of everything?