Answer:
I am asleep when you are awake I am awake when you fall asleep. I can fly but no feathers to aid my flight.
There was a green house. Inside the green house there was a white house. Inside the white house there was a red house. Inside the red house there were lots of babies. What is it?
With three eyes and as black as night I frequently knock down ten men with a single strike!
I am the best thing that can happen after a stick hits a ball.
Whoever makes it tells it not. Whoever takes it knows it not. Whoever knows it wants it not
No matter how little or how much you use me, you change me every month.