Sum Sudoku: Play Sum Sudoku and Calculate your IQ

Sum Sudoku is a new brain game created by the author of this book (Claude Ziad Bayeh) on 2015-02-23. It is created in order to develop the mental calculation, reflection, logical skill, computational speed, Processing speed, Intuition, Algebraic calculation, etc. This book contains 11 levels (from extremely easy to the hardest level) and 10 puzzles per level of the presented game in order to develop the level skills of the brain. The game is similar to the normal Sudoku in which the objecti...