It's the year 2025, a race of super intelligent X aliens, challenges the human race's knowledge, experimental secret prototype droids are humanity's last chance of survival. The prototypes take the shots. You. Have to call them. X Challenge brings an astonishing revamp to the mental math games. The only mental math workout packed with special sound and glowing visual effects.
Download the installer of X Challenge, Mental Math 2.2 free of charge and check out users' reviews on Droid Informer. The app runs on Android devices 2.3 and above. The download of this application is safe and secure. The game is designed by epollomes and its category is Education Games.