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The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square). One number is provided for you. Place the other 8 digits in their correct spots so that the mathematical equations work both across and down. IMPORTANT: Remember algebraic rules when solving the problems... multiplication/division should be performed in the first step, then addition/subtraction in the second. Good luck! Here is my... READ ON

The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square). Place the digits 1 through 9 in their correct spots so that the mathematical equations work both across and down. IMPORTANT: Remember algebraic rules when solving the problems... multiplication/division should be performed in the first step, then addition/subtraction in the second. Good luck! Here is my SOLUTION. NOTE: These puzzles... READ ON

Last week, reader Lola inquired if there was a way to construct a Math Square that didn't provide any number clues. There is, so we've offered one today for Brain Game #578. (Apologies for not publishing one yesterday; mentalfloss.com was experiencing difficulties due to a tricky update and kept deleting the post.) Enjoy! The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square). Place the 9 digits... READ ON

The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square). One of these numbers is already provided for you. Place the other digits in their correct spots so that the mathematical equations work both across and down. IMPORTANT: Remember algebraic rules when solving the problems... multiplication/division should be performed in the first step, then addition/subtraction in the second. Good luck!... READ ON

J.K. Rowling invented Quidditch in a pub.