How can you write nineteen in a manner that if we take out one, it becomes twenty?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

If eleven plus two equals one, what does nine plus five equal?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Which point will the car reach to go out?

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?

What is the riddle which can be asked all day with a different correct answer each time.

What you cannot hold but it is yours?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.