Answer:
What can fill an entire room without taking up any space?
You are participating in the swimming finals at the Olympics. In the final few seconds of the race you narrowly pass the swimmer who was in third place. What place did you get?
Is an older one-hundred dollar bill worth more than a newer one?
You can see me when two prisons throw light from one side and other side but odd number?
How is it possible to always find what your looking for in the last place you look?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around