價格：免費
更新日期：2018-09-13
檔案大小：2.9M
目前版本：1.31
版本需求：Android 4.0 以上版本
官方網站：mailto:orangestudio2000@gmail.com
It is the mathematical puzzle by filling in each box of between 5 numbers with the arithmetical operations (such as +, －, ×, ÷), it is to complete the correct equation.
There is also a limit in time. As you get to a higher grade, the time will be shorten.
Have fun!