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.