Word Illusions

Can you spot the mistakes?

Both of them :)

How many F's are there in the following sentence?

 

FINISHED FILES ARE THE

RESULT OF YEARS OF SCIENTI-

FIC RESEARCH COMBINED WITH

THE EXPERIENCE OF YEARS.

 

Count them carefully :)

I'll post how many later so that it doesn't ruin it for others. It's amazing that the brain does not take that word into account. Here is a puzzle: three men walk into a hotel. They want to share a room and are charged 30$. Each man pays 10$ and go to the room. When the manager hears about this however, he tells the bellhop that the charge for the room should have been 25$. He then gives the bellhop 5$ and tells him to distribute it to the men. Since 5$ cannot be easily divided by three men the bellhop decides to keep 2$ and give 1$ to each of the men. Now, each man paid 9$ each and that is 27$ total, plus the 2$ that the bellhop kept it 29$. What happened to the other dollar?

6!