
This one is really big! Let me know if you can solve it!
After decades of exercising your thumbs, Nintendo moves to your mind. Brain Age presents quick mental activities that help keep your DS brain in shape. Activities include quickly solving simple math problems, drawing pictures on the Touch Screen, solving sudoku, the number puzzle game and many more.
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karuro aka Cross-Sums, is yet another number game from japan, very difficult but highly addictive. It looks like a typical crossword puzzle with numbers in place of alphabets.