Brain Tuner - Math Game

Brain Tuner - Math Game is a mathematical calculation game for brain stimulation, 20 questions will appear one by one with 4 choices for every calculation containing one correct answer, you need to choose correct answer quickly and tap your finger as fast as possible.

It has three levels: Easy, Popular and Difficult

For every wrong calculation there would be 5 seconds penalty.

Final Score = Time Taken + (5*Wrong Calculation)

Score Criteria: Lower is better