Multiplication 12×12

We added a kind of question(recent errors). ---------- We added the function of the Game Center. You can compare your fastest time on a leaderboard. ---------- We added a kind of test. ---------- This is software for learning multiplication. And it is considered helpful to memorize the table up to 12 × 12. With the exercise mode, you sellect kind and row. And you push start button. So you are given questions. When you answer all the questions,it is displayed correct answer and your time. With the test mode, you sellect the number of question. When you answer all the questions, it is displayed correct answer and score and your time. When you answered all the questions correctly,you can update fastest time. We have added the function of the Game Center(Ver.1.4). You can compare your fastest time on a leaderboard. When you sellect "show" in the result view,leaderboard(GameCenter) is displayed. When you sellect "report", fastest time is reported to GameCenter.