Logic Riddles

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: There are 100 coins scattered in a dark room. 90 have heads facing up and 10 are facing tails up. You cannot tell which coins are which. How do you sort the coins into two piles that contain the same number of tails up coins?

Question: What is in the middle of the moon, At the end of an igloo And goes round in loops?