Mathrax consists of a square grid. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle’s side. No number may appear twice in any row or column. Circles with additional conditions may be situated on intersections of lines inside the grid.
• A number and a sign of mathematical operation (addition, subtraction, multiplication, division) - a number is a result of an operation execution with numbers in diagonally adjacent cells.
• A letter “E” (“even”) - all numbers in four cells are even.
• A letter “O” (“odd”) - all numbers in four cells are odd.

The puzzle book contain:
• 200 Puzzles
• Handy 6 x 9 inch Book Layout
• 2 Puzzles per Page
• Ideal for Beginners

In the book you will find a description and examples of solutions for all puzzles.
The book is for those who like logic and math problems. Decide, developing and improving.

"About this title" may belong to another edition of this title.

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