gbrainy: gbrainy is a brain teaser game and trainer.
gbrainy: 
gbrainy: gbrainy is a brain teaser game and trainer to have fun and to keep
gbrainy: your brain trained.
gbrainy: It provides the following types of games:
gbrainy:    * Logic puzzles. Games designed to challenge your reasoning and
gbrainy:      thinking skills.
gbrainy:    * Mental calculation. Games based on arithmetical operations
gbrainy:      designed to prove your mental calculation skills.
gbrainy:    * Memory trainers. Games designed to challenge your short term
gbrainy:      memory.