Answer:
There are 7 birds in a tree. A hunter shoots one bird down. How many birds are left in the tree?
A standard dimension for sandwiches and rulers
What goes up let's of a load and come back down
What do you have in December that you don't have in any other month?
What starts with an "e" but only has a single letter in it?
What never gets any wetter no matter how hard it rains?