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

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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

If eleven plus two equals one, what does nine plus five equal?

It's been the first day of the school when a young girl was found raped and murdered.
Police suspect four male teachers as on the killers and ask them what they were doing in the morning in time 8:00 am.
1. Wayne: I was reading the newspaper.
2. Terry: I was checking chemistry papers
3. Bridge: I had locked myself in my room as my wife left me.
4. Cole: I dropped my wife to her office.

Who is the killer?

What is the riddle which can be asked all day with a different correct answer each time.

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?