Answer:
I don't live within a house, nor do I live without. Most will use me when they come in, and again when they go out. What am I?
The eight of us go forth not back to protect our king from a foe's attack. What are we?
A dragons tooth in a mortals hand I kill I maim I divide the land.
I am drawn by everyone without pen or pencil
I am the kind of ant that's good at math.
When is it bad luck to see a black cat?