Here is a simple app that will help anyone improve their math skills. Features: - Free and offline - Suitable for any age - Includes 3 basic operations: Add, Subtract and Multiply - Set your own number range (sample: 1 to 3 or 20 to 2000 or 150 to 500 etc.) - All numbers are randomly generated - Timer is carefully adjusted depending on how many digits the answer has. Modes: Normal Mode Play with no time limit. Your points will be based on the time consumed with a correct answer. Beat D Clock Mode Each challenge has a specific time limit. Give the correct answer before time runs out.