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 sentance.

Count them ONLY ONCE: Do not go back and count them again.

See below for answer....

There are six F's in the sentence.

People of average intelligence find three of them.

If you spotted four, your above average.

If you got five, you can turn your nose at most anybody.

If you caught six, you're a genius.

There is no catch - most people forget the 'OF's - the human brain tends to see them as V's and not F's.

Weird, but true.