Answer:
In a year, there are 12 months. Seven months have 31 days. How many months have 28 days?
If you are unsure how to use one then just ask a flight attendant.
The part of the bird, that is not in the sky, Which can swim in the ocean and always stay dry. What is it?
A big shiny black car nobody wants to be a passenger in.
How many people are dead in a standard grave yard?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.