Good Riddles

Question: It is always bought when you're hungry, but it doesn't get eaten. What am I?

Question: If 2=8, 3=27, 4=64, and 6=216, what does 9 equal?

Question: When the answer I give is yes, it is no, and when the answer I give is no, it is yes. What is the question?

Question: Find the five digit number in which the first digit is one half of the the 4 fourth digit, the second digit is one fourth of the last digit, the fourth digit is 3 times the second digit, and the third digit is the first digit plus 4.

Question: Use the numbers 1, 2, 4, 5, 6, and 8 and the symbols (x) and (=) to form a true equation. Note: Each number and symbol is to only be used once and no extra number or symbol is included.