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Sudoku Mathrax - 200 Hard Puzzles 7x7 (Volume 10)

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$7.49
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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 numb...