Description: CHALLENGING and HIGHLY ADDICTIVE, GoSum is the numbers game that you won’t be able to stop playing with your friends! GoSum™ is an exciting mindboggler that pits your knowledge of numbers against any and all challengers. Absolutely addictive and undeniably fun, GoSum dares you to take turns building off your opponent's equations in the style of a crossword puzzle or sudoku. Whether playing against friends, family, or a random opponent, GoSum lets you enjoy 2, 3, or even 4-player games against anyone in the world without troublesome language barriers. An instant classic, GoSum provides an entertaining and interactive fusion of fun, wit, and learning for all ages! -- Features -- MAKE THOSE TURNS COUNT Take advantage of "bonus" squares to strategically increase scores SEE WHO IS UP TO THE CHALLENGE Play 2, 3 or 4-player games that’ll keep you on the edge of your seat. Invite and play your friends on Facebook or choose a random player CLIMB UP THE LEADERBOARDS Show off your high score and compare it to others by viewing the leaderboards SHOW OFF YOUR SCORE Login using your Facebook account to show your friends who’s top-dog Take on more number-crunching fun by visiting GoSum at gosum.com or on Facebook https://www.facebook.com/pages/GoSum/214155601939444