Many Puzzles

Free Electronic Puzzle Games that exercise your mind ready to play online!

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Fill the blank boxes with numbers from 1 to 9 (all of them can be used more than once) so that the across and down mathematical expressions (i.e. from left to right and from top to bottom) are correct. The first operation may equal a negative number or a number higher than 9, but never a decimal number. Some boards may have more than one solution.