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

Before Mount Everest was discovered, what was the highest mountain in the world?

Where do fish keep their money?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Can you find the mistake in the below statement?

The world's largest Thanksgiving turkey was on display at a fair. Everyone was admiring it when suddenly a woman ran up and shot the turkey and left. Everyone knew her yet nobody made any attempts to stop or report her. Why?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?