Challenge your mind is a set of puzzles which needs a little mathematical abilities to be solved, you just need to understand the puzzles logic to solve it, there is a limited levels in this free version, if you like the idea you can continue playing with the pro version which contains extra levels and ads free through this link:
https://play.google.com/store/apps/details?id=com.BlueN.challengeyourmindpro
9Apps 4.9
