【實用遊戲app】Ten Game|最夯免費app-綠色工廠好玩App

Make number TEN by using 4 numbers and operators (+,-,*,/).You have to answer in 90 seconds.But if your answer is correct, the limited time will extend 20 seconds. However, your answer is wrong, the time is decreased 10 seconds.(you can pass the question when you input no data and push OK button. but it also decrease the time)