lay the puzzle game that is taking the world by storm. Sudoku is a logic-based placement puzzle. The object is to fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9. Sudoku can also be played with 9 unique pictures or symbols. There are some examples of such games in the Sudoku for Kids section.
Excellent practice test site - Free! :) Has Educational Exams: ASVAB, ACT, SAT, etc... Computer Exams: MCSE, MCSD etc... Professional: Legal, Medical, Accounting etc... And some extras, like IQ and movie quizzes. Great Resource!