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Brain teaser: can you count?

Quick! Count the num­ber of times that the let­ter F appears in the fol­low­ing sentence:

Fin­ished files are the result of years of sci­en­tific study com­bined with the expe­ri­ence of years.”

How many did you find? Check out the solu­tion and expla­na­tion.


PS: Enjoy these 50 brain teasers to test your cog­ni­tive abil­ity. Free, and fun for adults of any age!

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45 Responses

  1. mariah says:

    i found four f’s. i promise you there are four f’s.

  2. valesh says:

    there is actu­ally only one ‘F’
    rest five are’f’s
    see in the ques­tion he aasked ‘F’s but not ‘f’s

  3. The per­son who makes me has no need for me The per­son who buys me doesn’t use me The per­son who is using me doesn’t know What am I?

  4. Tasha says:

    six. the rea­son peo­ple were meant to count less is because our minds aren’t sup­posed to trans­late the F’s in the word OF

  5. Nicky says:

    I found 6 first try and actu­ally when I ini­tially started count­ing I glossed over the of but then stopped, went back and included the of’s in the count THEN read the expla­na­tion and had a chuckle. Quite the lit­tle men­tal trick!

  6. NATACHA says:


  7. Joan says:

    six it is

  8. Kiara says:

    i counted six

  9. Craig says:

    It is never good to com­pli­cate a sim­ple thing. How about we change the intro to say,… “read aloud, the words you see below.“
    “Finished files are the result of years of sci­en­tific study com­bined with the expe­ri­ence of years”… Then ask how many times the let­ter after the let­ter E in the eng­lish alpha­bet is used in what you just said?

  10. Rontre says:

    Hello from the Bahamas.
    There are 6 f’s in the sen­tence. It’s basi­cally here to say that the human brain doesn’t take in the word “of” as a word with f because it is said as “ov”.

  11. rach says:

    i found 4

  12. rach says:

    no wait i found 8

  13. ali says:

    6. There are only 6. Show me the others.

  14. Olivia says:

    At fist I counted 3, not even acknologing the F’s in the words like “of”. I then recounted it, and I counted 6.

  15. Dimwit says:

    I found 16

  16. kex says:

    Whats the answer to the rid­dle. tasha

  17. Dickface says:

    i cant count :(

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