Good Riddles

Question: What is as big as you are and yet does not weigh anything?

Question: What can fall but never stay, something colorless with peoples dislikes?

Question: When is 99 EQUAL to 100? 😄 ----------- =

Question: Decapitate me and all becomes equal. Then truncate me and I become second. Cut me front and back and I become two less than I started. What am I?

Question: Suppose you had to pick 1 of 3 doors to go through. One has ninja assassins, one has a lion that hasn't eaten in 3 months, and one has a flaming inferno. Which door should you choose in order to live?