Answer:
Split me in half, and you get me and another me. What word am I?
There are four of these, but everyone's favorite seems to be spades.
What has many keys but cannot open a single lock or door?
People want it, and when they have it, they use it by giving it
Of these everyone has ten, part of two wholes at the arms end. What are they?
When is it bad luck to see a black cat?