Slide numbers to match patterns - not as easy as it looks! 140 puzzles to win, can YOU beat Professor Addkins? A great brain game suitable for young and old. The entire game is FREE to play, and contains in-app purchases* for non-essential boosters and early unlocks. *** Previously featured in the App Store's Best New Games *** "Charming throughout...has that Layton-esque quality to it" (4 stars) - 148Apps.com “Simply put, SUM IDEA is an ingenious and seamless number puzzle game that will surely put your mind through its paces.” (9/10) - geekntech.com *In-app purchases can be disabled within the Settings App on your device under Settings > General > Restrictions