How brawny is your brain? Sanctioned by Mensa, the internationally famous high-IQ society, "Mensa 365 Brain Puzzlers" is the calendar with hundreds of word and number puzzles that are guaranteed to make your neurons sweat. Every day brings a new challenge. Four of a Kind. Palindromes. Odd Man Out. And: "Patti starts to correct a pile of 163 multiple-choice tests at a rate of four per minute. Five minutes later Sandy joins her, and corrects tests at a rate of seven per minute. When they are finished correcting the entire pile, how many papers has each corrected? "Answers are on the reverse side of each page just in case you re having an off day.