Answer:
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
I cannot be burned in fire or drowned in water
I am the kind of ant that's good at math.
I have three eyes and only one leg. Obey me or you will be sorry.
Before Mt. Everest was discovered what was the highest mountain in the world?
What language does a billboard speak?