Learning to ninety-nine
Is a simple app.

By default, pressing the start,
20 questions are questions the old random-nine problems,
Once I get all the correct response rate.

Settings from the menu button on the number of questions
20 questions, 15 questions, 10 questions to choose from.

practice-mode does not have your assignment.
I get a hint of the answer.

The listing will display a list of 9*9.

Internet connection permission, the
Are used only for ads.

Tags: 九九20問

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