I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

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

The more you take me, the more you leave me behind.
Who Am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I have an eye but still cannot see.

Who am I?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What month of the year has 28 days?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?