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?
A grandmother, two mothers and two daughters went shopping together and everyone bought one purse each. How many purses did they bring home all together?
What can you stick between a 3 and a 4 so that the result is more than three but less than four?
If you count 20 houses on your right going to the store and 20 houses on your left coming home, how many houses did you count?
How do you drop an egg and never break it?
It is something you will never see again.