SquareMath(c) is a new brain game invented by "Claude Ziad El-Bayeh" on Mach 6, 2005." The main goal is to fill a grid with sequential numbers (for example, from 1 to 9 for a 3x3 grid). The filling of numbers follows some rules in which the sum of a line or column is equal to a particular value mentioned on the right and the bottom sides of the grid, respectively. The multiplication of a line or column is equal to a specific value indicated on the left and upper sides of the grid, respectively. This book has 5 levels with 100 new puzzles. It starts with the easiest level and ends with the hardest and most challenging level. This game develops your mental abilities and improves your intelligence, mental calculation, concentration, short and long term memory, reflection, logic, quantitative & analytical reasoning, processing & reaction speed, decision-making, attention, etc., in general, your brain's performance. Also, this book provides you an original method created by the author to calculate your brain's performance, the development of your intelligence, and your Specific Skill Intelligence. People who love Sudoku, brain games, and brain teasers, and who want to improve their mental ability are invited to try this new game and provide their comments and suggestions to the author.LET'S TRY SOMETHING NEW AND CHALLENGING!ENJOY THE GAME!