Cooling weather, kids in school, leaves falling, and *Monday Night Football*. All is right with the world. Here's today's mentalfloss.com **Brain Game** *Monday Math Square *challenge:

Place the digits 1 through 9 in the white blanks so that the mathematical equations work both across and down. Each digit 1 through 9 should appear *only once* in the main grid (the red square).

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**NOTE: **These puzzles rarely (but occasionally) have alternate solutions that fit the rules. If you find one of these, **first make sure that you've followed the instructions to the letter, **then pat yourself on the back (and feel free to share your numbers with us in the comments).

**THE SOLUTION:**