A short IQ-test - be surprised

This is no joke, try it and do NOT cheat, otherwise you will miss the surprise!

Count the amount of "f" in the following paragraph:

FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS

Done? Scroll down after counting.


























OK? How many? Three

















Wrong, it's six - no kidding!


Scroll up and read again!
The solution is explained when you scroll down further.





















The solution: The brain doesn't process the word "OF".
Strange, isn't it?

The one who counted all six F at the first try is a genius - three is normal.