Fun Riddles

Question: I had a bright start,
but I couldn't take the pressure.
I consume everything,
yet I don't eat anything.
What am I?

Question: You are surrounded by a 100 foot wide and 100 foot deep moat. You have a 40 foot tall ladder, matches, a gallon of water, and as much rope as you need.

How can you get across the moat?

Question: I'm number three.
But I'm not a number.
I'm hot and cold at the same moment but not at the same time.
I'm number three.
But I'm not a number.

Who or what am I?

Question: A man finds a small iron coin dated 154 B.C., what's it worth?

Question: The more of me you have, the longer your life.
The more of me you have, the less you have left.

What am I?