UPDATE - As a result of dillsage's astute observations, I have reprogrammed the text-based flashcard generator to prevent multiple identical questions or answers. This has resulted in limits being applied to the number of cards you can produce for certain set types. The most severely affected are single digit addition - now restricted to 9 cards - and single digit doubles, now limited to 19 cards. Where the limit is above 47, it is not labelled because most people shouldn't be trying to create any more than that. This one was certainly a mind-bender and has had me pacing the room a number of times. It's approaching "I should be paid for this", so I'm going to take a little break, then attempt the same thing for image sets.