Each empty white square in the grid contains one of the numbers 1, 2, 3,..., 8. Each of the horizontal and vertical equations must be true, and each number must be used exactly once.
Puzzle Copyright © Erich Friedman
Each empty white square in the grid contains one of the numbers 1, 2, 3,..., 8. Each of the horizontal and vertical equations must be true, and each number must be used exactly once.
Puzzle Copyright © Erich Friedman