Good Riddles

Question: What has to be broken before you can use it?

Question: 16 06 68 88 ? 98.

What is the '?'?

Question: You may always chase me but you are always about 3 miles away.

What am I?

Question: If it takes three men two days to dig a hole, how long does it take one man to dig half of a hole?

Question: It turns into a different story.

What is it?