Riddle from a book I read

Question: Before your choose the witching hour, take care to dream the tallest tower. Than careful before you leave too soon--behold the dark and hollow moon. What's the number? (This Riddle is from the Eye of Minds, by James Dashner.)

Question: What is that thing we buy for eating but cannot eat it?

Question: What tastes better than it smells?

Question: You build a house and all 4 walls are facing south. Where did you build the house?

Question: What goes in the water black and comes out red?

Question: What loses its head in the morning and gets it back at night?