Answer:
I know a word of letters three. Add two and fewer there will be. What is the word?
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
It is greater than God more evil than the devil. The poor have it the rich need it. If you eat it you will die. What is it?
I have three feet but I cannot walk. What am I?
I hold two meanings. With one I may be broken with the other I hold on.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.