Answer:
The more that there is of this, the less you see. What is it?
There are 20 birds in a tree. A man comes and shoots one of the birds. How many birds are left?
How do you make the number one disappear by adding to it?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
On which day of the year do fewest people die?
What never gets any wetter no matter how hard it rains?