1009
xkcd #2869: Puzzles
(imgs.xkcd.com)
Alt text:
Why couldn't the amulet have been hidden by Aunt Alice, who understands modern key exchange algorithms?
Futurama did a great take on this with their Da Vinci Code parody episode.
Animatronio mentioned a fountain. That's a statue of Neptune, god of water. The number of points on him trident is three, or trey. The "u" in his name is written like "v". Trey, "v". Trevi! It's the Trevi Fountain. There can be no question!
"but what about--?"
"There can be no question!!"
Gotta love it
This except instead of going directly through that thought process, one character will say, "I've got it! Follow me!" And the chapter ends, followed by a chapter from the pov of every other character who isn't involved in that discovery.