Logic Riddles

Question: What disappears as soon as you say it?

Question: Can you make VI out of IX?

Question: Spell "Hard Water" using only 3 letters.

Question: You have 20 sick sheep, one dies. How many are left?

Question: You are walking down the road trying to find enlightenment when you come to a monk and a three-way fork in the road. The roads point North, East, and West. You can ask the monk one question. He will answer honestly yes, no, or just hum if he cannot answer the question.

What do you ask him to figure out the correct path?