In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

It is always ahead of me yet I can never see it. What is it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Which five letter word can be added at the end of below word to form a
valid word?

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I taste better than I can smell. Who am I?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

How can you leave a room with two legs and return with six legs?