This is my 83+ "Puzzle of the Day" page, or something like that.
This isn't really a daily thing, it's just whenever someone figures out the previous puzzle. Here's the idea:
A puzzle involving some form of the 73/83+ series calculators will be posted here, and it's up to you to figure out what's going on with it.
All you have to do is post on that puzzle's page what you think the answer is, and if you can explain how it works, you win! What do you win? Nothing, I guess...