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?

who is silent in the parliament?

Move four matchsticks to the below square to form three squares?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

There is something which is always coming but never arrives?

How can you leave a room with two legs and return with six legs?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?