Mental Calculation FLASH ANZAN

This is japanese right brain training called Flash Anzan. You add all numbers popping up one after another. This mental arithmetic application will make you able to perform hundreds calculations a minute. If you fall into a slump, you should remember following words. Don't think. FEEL!(Bruce Lee) Main function: Speed range (4.0sec - 0.15sec) Number of Digits (1 - 5) Number of calculation times (5 - 100) Including negative number or not Fix number of digits or not To save the percentage of questions answered correctly To retry the previous question To start again where you left off