The programming/math puzzles idea is nice although it's quite different from what apophenia is so it would probably be a sister website. It's more hard to create those puzzles and the betting model would also need to be different most likely. I'll give it some thought... ;-)
The last one shouldn't be too hard I think btw, that's why I left it hintless. :-) It will get clear soon enough.
Do we have to wait same image for 6-7 days? Can you put more puzzles at the same time?
well i guess it would be too big of a loss for him, people usually dont guess if they dont know the image and the prize is usually much bigger than the bet