Textbook case #1 : The basic puzzle
This is the simplest type of puzzle. You are given either a math or logic problem to solve that will yield coordinates that will take you to the container.
The puzzle

After you figure out what to do with the above image, remember to add a half unit to each of the last elements.
You can check your answers for this puzzle on GeoChecker.com.
A hint is generally provided, either for the puzzle, the container or both. The hint can be very explicit, like in this situation, or very obscure; that's up to the cache owner. I have chosen to give a very explicit hint here, so please be sure NOT to reveal it if you want to solve the puzzle on your own; there is also a hint for the container location, but I say again : do not reveal the hint unless you're stuck and totally desperate. Once you have solved the puzzle, you may look at the hint for the final location.
When the problem cannot, or is very unlikely to take you to the wrong location, a geochecker is generally not provided. The problem at hand falls into this category, but for the sake of the exercise, a checker is available, so that you can get a feeling of what it looks like.
Disclaimer
- This geocaching series IS NOT a complete reference for mystery ideas.
- You WILL NOT find references to other caches that share the same or similar ideas; if there are any, you will need to figure it out by yourself.
- Once you will solve the puzzles, you will get an access code to a library of mystery ideas (not yet online, but it will be soon).
- The ideas behind these caches are generally not original, so credits go to my predecessors.
- Field puzzles are not yet covered by this series.
- Some of the textbook cases will have a name, some will not, depending on whether this will be a substantial hint or not
- Try to solve the puzzles in order, as some may contain useful information for later ones; however, this is not a requirement, as you may find later puzzles easier than earlier ones.
- Once you have solved a puzzle, remember what you have learned, as you may need it for later caches.
- Some you may find these puzzles trivial, but remember, it's all about having fun
Enjoy your adventure.
The cache professor

Images used in these listings (C) respective owners.
