ShunZanFree

It is a game which adds the number displayed for a moment in mental arithmetic, and answers. Score with the degree of difficulty, and record is seen to the best 5. The number of digits is 2-digit or 3-digit.A digit number is 2 figures or 3 figures. You can choose a range of up to 1.3 seconds from 0.7 seconds to display the number of seconds. You can play a little free time. How is it at brain training?