APOLOGIES: I made an error in the first Math Square today. This is a revised version that fixes the mistake. Sorry, folks!
The next-to-last week of the year opens with today's mentalfloss.com Brain Game, a new Monday Math Square. Good luck!
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... READ ON