For Fun: Why don't we see some letters?

[David Mosley]

Try this puzzle:

Please read this sentence and count the Fs:

FINISHED FILES ARE THE
RESULT OF YEARS OF SCIEN-
TIFIC STUDY COMBINED
WITH THE EXPERIENCE
OF YEARS.

How many do you see?

On first reading most people only see three. However, the answer is actually

six.

[voilodian ghagnasdiak]

Of Of Of course you dont notice three of the f's at first glance.

[Morgan Kane]

In fact the F of the three of are lost some where ......

[Heiron]

Ha,I have come across something similar before.I noticed the last F and realised there were 2 more.So,I guess I just saw 4,but I was that close to watch all of them.This time,I counted all of them in the first place,of course.

[L'Etranger]

Try this puzzle:

Please read this sentence and count the Fs:

FINISHED FILES ARE THE
RESULT OF YEARS OF SCIEN-
TIFIC STUDY COMBINED
WITH THE EXPERIENCE
OF YEARS.

How many do you see?

On first reading most people only see three. However, the answer is actually

six.

You actually see seven If you rearange the text like this:

FINISHED FILES ARE THE
RESULT
OF YEARS
OF SCIENTIFIC STUDY
COMBINED
WITH
THE
EXPER-
IENCE
OF
YEARS.

[Hawksun]

Very clever!