RULE 2: If you join various numbers and do not comply with rule 1 they will be added up. For example: If you join a number 1 and a 2: A number 3 will be generated. If you join a number 1, a 2 and another 1: A number 4 will be generated. Starting to play is very simple. Stopping is not so easy as your brain exercises more and more as you complete the almost 300 challenges proposed by the game, being a very good amusing challenge. CHARACTERISTICS: - Unique, simple and addictive playability. - Almost 300 free levels. - Weekly tournaments with prizes. - Split screen for iPad. - Synchronisation by iCloud or Facebook. - Retina graphics for iPhone and iPad. - Integration with Game Center. - Universal and free.