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Flash Mental Math is a simple flash mental arithmetic app for brain training, calculation practice, and focus. Watch the numbers appear one by one in the center of the screen, add them together, and enter your answer. Before you start, choose only the digit length, speed, and number of values shown in each question. Practice with 1 to 4 digit numbers, slow, standard, or fast speed, and 5, 10, 15, or 20 numbers. Each game has 10 questions, making it easy to train during a short break, before commuting, or whenever you want a quick focus boost. During the game, readability and rhythm come first. Unnecessary effects are kept to a minimum so you can concentrate on the numbers. After the display ends, enter your answer and instantly check whether it is correct. Results are saved automatically. On the home screen, you can see today’s questions, correct answers, accuracy, and current streak. Past results can be reviewed in the calendar and daily history. Graphs show changes in questions, correct answers, accuracy, and score. Stats by digit length summarize your best score, total games, total play time, total questions, total correct answers, and average answer time. It is easy to see your strengths, your progress, and what you may want to practice next. Leaderboards let you challenge scores by digit length and streak records. Start with 1 digit, standard speed, and 10 numbers. Once you get used to it, raise the digit length, increase the speed, or add more numbers at your own pace. Premium offers an ad-free experience, theme color changes, and custom speed adjustment. Basic practice, history, calendar, graphs, stats, and leaderboards remain available. Turn flash mental math into a short daily habit and track your progress over time.