Just do it. Do not cheat! Because of you did, this test would be no fun. We promise that there are no tricks to this test.

Read the sentence below:

FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS

The question: How many times do you see the letter F in the sentence above? Count them only once! Do not go back and count them again!

The solution: Click here!