The test is intended for primary school students and those who want to learn or test knowledge of the mathematical addition and subtraction tables.- The test has two options: * simple, and * time limited.- The test consists of 8 levels and each level consists of 8 questions.- Questions are always asked randomly.- 3 answer options + option "other"- The correct answer is shown after each incorrectly answered question.- At the end of the test, incorrect answers are shown on the addition /subtraction table.- Clear interface- Convenient design- Support for multiple languages- Free updates.Permissions:• INTERNET - for communication between the game and Google services.• ACCESS_NETWORK_STATE - for the correct operation of AdMob ads.• WRITE_EXTERNAL_STORAGE - "Share" function will use media store to save and share image with test final result.