1] I have all the knowledge you have. But I am small as your fist that your hands can hold me. Who am I?

2] You always make a more of them, but leave more of them behind you. The more you do, the more you leave behind. Tell what is it?

3] Find me who am I. I am the building with number stories.

4] When you do know me about me, them I am definitely something. You will always search for me. But when you know me, I am nothing. Who am I?

5] Everyone in the world break me when they speak every time. Who am I?