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?
You have a bucket full with 5 gallons of water. What can you ADD to it in order to make it 3 gallons?
The more that there is of this, the less you see. What is it?
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?
What can fill an entire room without taking up any space?
It is something you will never see again.
Logic
Animal
Difficult
Easy
Food
Funny
Kids
What am I?