Mathrax is a logic puzzle. 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 appear 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.

**** Mathrax features ****

Content

• 6 different sizes of board
• 5 difficulty levels
• more than 500 levels

Features

• Highlight wrong number automatically
• Autosave the process of unfinished levels
• Record best completion time for each level

Challenge

• Game Center Achievements
• Try to complete as many levels as possible