Answer:
Three doctors said that Bill was their brother. Bill said he had no brothers. Who was lying?
What can you hold in your right hand but never in your left hand?
The yellow house has yellow window, the red house has red windows, what colour windows does the green house have?
What can you stick between a 3 and a 4 so that the result is more than three but less than four?
If a rooster lays an egg on the exact peak of a barn, which side does it fall?
What never gets any wetter no matter how hard it rains?