Don't cheat and look at the answer first. Try it. It really works. This one is somewhat suprising. It's not a joke as such,but a demonstartion of the faults of the human brain. Follow the exercise as dictated below
Read This Sentence:
FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIF-
IC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS.
Now count aloud the F's in that sentence. Count them ONLY ONCE, don't go back to re-check. Then see the answer below...
ANSWER
There are six F's in the sentence. One of the average intelligence finds three of them.If you spotted four, you're above average. If you spotted five, you can turn your nose at almost anybody. If you caught six, you are a genius(except if you're names Darren..kidding)
There is no catch. Many people forget the OFs. The brain of the English speaking people tend to see them as V's instead of F's.