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
But this way money flow is so slow. Players have to wait and play only 1 puzzle every week.