How many F's are there in the following text: FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"?

Explanation

Did you manage to catch them all? There are 6 altogether. Most people overlook the 'F' in the word 'of', thus only getting to a total of 3 'F'. This is due to the way the brain and the eye function. The brain often sees the 'F' in 'OF' as a 'V'.