Improve your fluid intelligence and short-term memory. Match features of symbols that show up on the screen with ones that shown up before. See: http://en.wikipedia.org/wiki/N-back
Updated on
Feb 15, 2016
Puzzle
Data safety
arrow_forward
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.