A man dies of old age on his 25 birthday. How is this possible?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What work can one never finish?

What question can you never answer yes to?

I look at you, you look at me I raise my right, you raise your left. What am I?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?