Mental Calculation FLASH ANZAN 3.0.3

This is a Japanese right-brain training method known as Flash Anzan.

• You are required to add all the numbers that appear one after another.

This mental arithmetic tool aims to enhance your ability to perform hundreds of calculations per minute. In case you encounter a challenge, it's recommended to recall the words of Bruce Lee: "Don't think. Feel!"

Main features:

• Speed range: 4.0 seconds to 0.15 seconds
• Number of digits: 1 to 5
• Number of calculation rounds: 5 to 100

Allows customization such as inclusion of negative numbers, adjustable number of digits, ability to save the percentage of correct answers, option to retry the previous question, and resume from where you last stopped.