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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

What you cannot hold but it is yours?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

If you say my name, I will no longer exist. What am I?