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"

What is more useful when it is broken?

How many times can you subtract the number two from the number fifty?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers.

But do you know how many of these numbers are prime?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

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

Can you write down eight eights so that they add up to one thousand?

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