Answer:
It weighs next to nothing but no one can hold it for long. What is it?
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?
MT_TF_S What are the missing letters? Why?
What never asks questions but is often answered?
When is it bad luck to see a black cat?