This app offers over 80 probability math puzzles in three levels. I've included a math parser so that you can type equations as answers: if the answer is 0.49^2, for example, you can enter 0.49^2 or 0.49*0.49 without having to work out the multiplication yourself. Some of the puzzles are very challenging, even for people who have studied college-level probability -- try answering them all! If you get stuck, there's a hint at the bottom of each page, and you can always skip puzzles (and return to them later) by swiping horizontally. Have fun!
Two new puzzles, plus improved hints for several existing puzzles.