Great app that will get you thinking
This is a really good app for iPhone because it's easier to move the numbers around with your finger than with a stylus pen - erase, write, erase, write. If your kids get bored during long drives, waiting around or down time. This app is a great way to have them do some real thinking. The game is similar to sudoku. All the rows have to be the same. There is more than 1 hint so only use it if you have to! The hints give away the mathematical formulas. It's not just guessing! took me 5 minutes to solve the first one, but after you take hints, it is faster.
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