Its a game that develop your ability to decide a prime number in an instant.
While aiming to improve your intuition and analytical ability in math, please feel the beauty of math.
【How To Play】
There will be 5 questions
In less than 15 second, tap the prime number that you think is right.
If you finish selecting it, press "Next".
If you forget to select the answer, a " X " will automatically appear.
If you finish setting numbers of questions or ending the game, a ranking will appear.
You can select the level and number of questions in Top page