read the following sentence once, and only once.

in your head, as you are reading, count the letter f's.

count them quickly, only once.

no cheating!

finished files are the result of years of scientific study combined with the experience of years

now scroll down quickly!!!

answer below...

answer below...

answer below...

answer below...

there are 6 f's in the sentence!

one of average intelligence finds 3 of them.

if you found 4, you are above average.

if you found 5, you can turn your nose up at anyone!

if you found 6, you're a genius!

no catch. many people don't recognise the of's. apparently, the human brain tends to see an 'f' as a 'v' when it is preceeded by an 'o'.