Mental challenge description

Mental challenge allows you to streamline your mind in a fun way!

The game consists of four basic operations (addition, subtraction, multiplication and division), in four different game modes, in the course of each of these, the application randomly select operations to solve.
The game features a high score table where the highest scores appear in every game type.

The 4 modes are:

>60 seconds -. In this game you have to answer as many operations as you can in a minute.

>Hit and increase.- You count with 60 seconds, each correct answer will increase 3 seconds and each incorrect answer will subtract 2 seconds.

>Number lost.- Here you have to calculate the missing number in the operation.

>Training.- Here you can make as many operations as you want with no time limit.