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

I make two people out of one. What am I?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

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?

I don't get anymore wetter, no matter how much rain falls on me.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.