Answer:
Which popular cheese is made backwards?
What comes one time in today, three times in tomorrow and never in the future?
You have it even if there is none.
I am a piece of paper that takes most people 3 or 4 years to get. What am I?
Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?
I am a room that has a roof but no walls. What am I?