Letter Counting Optical Illusion

Are you guys and gals out there ready for yet another brain teaser optical illusion? I know you all absolutely love these types of optical illusions, which is why I’ve started to focus more on posting brain teasers up for all of you out there. This brain teaser is one of those ones that are definitely going to mess with your mind. I would suggest reading over the paragraph first of all and then counting up all the F’s that can be found in the paragraph. However, it’s completely up to you. Either way, you should only count the F’s you find one time and then post your results in the comment section below this post. Now, I present you with this letter counting optical illusion.

How Many F Optical Illusion

© Gianni A. Sarcone, www.archimedes-lab.org. All rights reserved.

So, now that you’ve read over the image above, how many F’s were you able to count in the text? You should leave your answer below in the comments section and let us know what you came up with. I bet we will see a bunch of different answers. If you liked this optical illusion, you should let us know by leaving a rating. Also, don’t forget to share this with your friends and see if you can stump them, as well.

85 Replies to “Letter Counting Optical Illusion”

  1. I counted 10, and only after noticed that the illusion wasn’t really about the number of F’s, but in the fact that we didn’t notice repeated OF’s.

  2. Amazing… I went back and back, and could still only count 9. Went into photoshop and crossed out non-F’s and marked the F’s. Still only found 9.

    For some reason, like James, I didn’t see the “University of Ushuaia”. My brain seems to have chunked that as one unit without an ‘of’ in it!

    Great puzzle!

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