I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

There was a strange boy who was born before his father. How can this be possible?

I can be cracked, made, told, and played. What am I?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

What question can you never answer yes to?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Can you write down eight eights so that they add up to one thousand?