SimpleBrainTraining description

It is simple brain training application to judge from ◯ or an X whether the calculation result of one column - three columns of numbers is a correct answer or injustice.

Can several continuations answer it correctly?

＃ The division cuts off a decimal.
　example
　30 ÷ 4 ＝ 7
　30 ÷ 31 ＝ 0

[tag]
Brain training calculation ◯× time killing