A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

I have a head like a cat and feet like a cat, but I am not a cat. 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?

I am the fastest animal but cannot climb the tree. What am I?

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

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

How can you take 2 from 5 and leave 4?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?