err..not smart enough I guess. I only counted 4 out of 6...*lowers head in shame*

I got 6

When you stumble upon this test for the 34th time or so, it's not that strange that the element of surprise is pretty much gone. No one who has seen this one before will fall into its trap again - or at least I hope they won't. ;)
But the idea was that somehow people sometimes fail to register the f's in "of", and thus end up answering the wrong amount of f's.

6

3