Logic Riddles

Question: In the harbor of a small town, there is a large boat. Coming off of the boat is a ladder reaching down so that the bottom rung is just above the surface of the water. As the tide comes in, the water rises at 1 foot every 30 minutes, and continues like this for 3 hours. If the rungs are each 1 foot apart, how many rungs are under water when the tide stops rising?

Question: Dracula was out getting a drink but his watch was broken so he died.

Why?

Question: One female dog goes in and there are no other dogs in there so why did dogs come out?

Question: A farmer has 10 cows, all but six die. How many are left?

Question: On a boat in a lake, there is a rope ladder. The rope ladder is 5 inches off the water. Then one day the lake waters rise 5 inches. How high off the water is the ladder now?