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

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What does it mean?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What you cannot hold but it is yours?

Keyboard words are not in alphabetical order, Why?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?