If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

I am white when I am dirty, and black when I am clean. What am I?

I have no life, but I can die. What am I?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

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

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?