3-in-1 Bundle Brain Trainings: Mental Math

This additional game mode for 3-in-1 Bundle Brain Trainings consists of a series of math questions for the purpose of improving the player's mental arithmetic skills. The questions can be customized according to the player's preferences, with the ability to set a time limit, limit numbers in the questions to a certain range, and enable or disable addition, subtraction, multiplication, and division questions. Questions can be skipped by pressing the space bar.