Neat little time passer
This app is not meant to help you learn or improve on your math. To me it is like a sudoku. You have to look at the numbers at think about what can be done with them. It does help to refresh your basic math like 8x7 which can be useful but not used in everyday life. I like this app for that reason on breaks or to pass waiting time.
Myanonymous about
Conundra Math: a brain training number game for iPhone and iPad