Before Mount Everest was discovered, what was the highest mountain in the world?

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?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

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

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

What breaks yet never falls, and what falls yet never breaks?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

The more of this there is, the less you see. What is it?