Keep your mind healthy, test your mental math and exercise your brain once a day.
It's a hard math game.
Math exercises (square, square root, factorial and find an arithmetic rule).
<div> <div class="id-app-translated-desc" style="display:none">保持你的头脑健康,考验你的心算和锻炼你的大脑,每天一次。
这是一个困难的数学游戏。
数学练习(平方,平方根,阶乘,发现算术规则)。<div> <div class="show-more-end">