Answer:
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?
The yellow house has yellow window, the red house has red windows, what colour windows does the green house have?
I have two coins, one is marked George I and one is marked George IV. One is genuine but one is a forgery. Which is the forgery?
What can you hold in your right hand but never in your left hand?
What is the largest $ amount of change you can have in your pocket without having exact change for $1?
What did the piece of wood say when he saw the screwdriver and screws approaching?