If it's all Greek to you, you'll have a hand up solving today's mentalfloss.com Brain Game Tuesday Test Time challenge. Enjoy! What FOUR letters of the Greek alphabet are represented in English by TWO-letter names? Here are the ANSWERS. THE ANSWERS: MU, NU, XI, and PI. Thanks for playing! Tomorrow, it's Wordplay... READ ON

Say hello to Michael, whose likes and dislikes will help you solve today's mentalfloss.com Brain Game Free-for-all Friday challenge. Good luck! Michael likes the nickname Mike but hates to be called Mickey. He would rather stay at a hotel than a campsite. He'll have a sip of whiskey but steers clear of gin. Michael plays golf but doesn't care for tennis. And he'd rather fly Delta than Southwest. With all these in mind, which ONE of these three dances would Michael NOT like to perform?... READ ON

Today's mentalfloss.com Brain Game Wednesday Wordplay challenge is an early Halloween word ladder to get us in that "spooky" mood. Good luck: By changing one letter in each step to form English words, and leaving all other letters in their original positions, convert BLOOD into DRIPS in the fewest possible steps. B L O O D _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ D R I P S Here is an 8-step SOLUTION. AN 8-STEP SOLUTION: B L O O D B L O N D B L A N D B R... READ ON

Please enjoy today's new mentalfloss.com Brain Game Monday Math Square challenge. Good luck: 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). Here is the SOLUTION. 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,... READ ON