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

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What has one letter and starts with an E?

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?

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?

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

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?

What jumps when it walks and sits when it stands?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

I have no life, but I can die. What am I?